Ok so I have been making a simple code editor in vb.net for go.. (for personal uses)
I tried this code -
Dim tokens As String = "(break|default|func|interface|select|case|defer|go|map|struct|chan|else|goto|package|switch|const|fallthrough|if|range|type|continue|for|import|return|var)"
Dim rex As New Regex(tokens)
Dim mc As MatchCollection = rex.Matches(TextBox2.Text)
Dim StartCursorPosition As Integer = TextBox2.SelectionStart
For Each m As Match In mc
Dim startIndex As Integer = m.Index
Dim StopIndex As Integer = m.Length
TextBox2.[Select](startIndex, StopIndex)
TextBox2.SelectionColor = Color.FromArgb(0, 122, 204)
TextBox2.SelectionStart = StartCursorPosition
TextBox2.SelectionColor = Color.RebeccaPurple
Next
but I couldn't add something like print statements say I want a fmt.Println("Hello World"), that is not possible, anyone help me?
I want a simple result that will do proper syntax without glitching text colors like this current code does.
Here's a code showing how to update highlighting with strings and numbers.
You would need to tweak it further to support syntax like comments, etc.
private Regex BuildExpression()
{
string[] exprs = {
"(break|default|func|interface|select|case|defer|go|map|struct|chan|else|goto|package|switch|const|fallthrough|if|range|type|continue|for|import|return|var)",
#"([0-9]+\.[0-9]*(e|E)(\+|\-)?[0-9]+)|([0-9]+\.[0-9]*)|([0-9]+)",
"(\"\")|\"((((\\\\\")|(\"\")|[^\"])*\")|(((\\\\\")|(\"\")|[^\"])*))"
};
StringBuilder sb = new StringBuilder();
for (int i = 0; i < exprs.Length; i++)
{
string expr = exprs[i];
if ((expr != null) && (expr != string.Empty))
sb.Append(string.Format("(?<{0}>{1})", "_" + i.ToString(), expr) + "|");
}
if (sb.Length > 0)
sb.Remove(sb.Length - 1, 1);
RegexOptions options = RegexOptions.ExplicitCapture | RegexOptions.IgnorePatternWhitespace | RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase;
return new Regex(sb.ToString(), options);
}
private void HighlightSyntax()
{
var colors = new Dictionary<int, Color>();
var expression = BuildExpression();
Color[] clrs = { Color.Teal, Color.Red, Color.Blue };
int[] intarray = expression.GetGroupNumbers();
foreach (int i in intarray)
{
var name = expression.GroupNameFromNumber(i);
if ((name != null) && (name.Length > 0) && (name[0] == '_'))
{
var idx = int.Parse(name.Substring(1));
if (idx < clrs.Length)
colors.Add(i, clrs[idx]);
}
}
foreach (Match match in expression.Matches(richTextBox1.Text))
{
int index = match.Index;
int length = match.Length;
richTextBox1.Select(index, length);
for (int i = 0; i < match.Groups.Count; i++)
{
if (match.Groups[i].Success)
{
if (colors.ContainsKey(i))
{
richTextBox1.SelectionColor = colors[i];
break;
}
}
}
}
}
What we found during development of our Code Editor libraries, is that the regular expression-based parsers are hard to adapt to fully support advanced syntax like contextual keywords (LINQ) or interpolated strings.
You might find a bit more information here:
https://www.alternetsoft.com/blog/code-parsing-explained
The most accurate syntax highlighting for VB.NET can be implemented using Microsoft.CodeAnalysis API, it's the same API used internally by Visual Studio text editor.
Below is sample code showing how to get classified spans for VB.NET code (every span contains start/end position within the text and classification type, i.e. keyword, string, etc.). These spans then can be used to highlight text inside a textbox.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Classification;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Text;
public class VBClassifier
{
private Workspace workspace;
private static string FileContent = #"
Public Sub Run()
Dim test as TestClass = new TestClass()
End Sub";
public void Classify()
{
var project = InitProject();
var doc = AddDocument(project, "file1.vb", FileContent);
var spans = Classify(doc);
}
protected IEnumerable<ClassifiedSpan> Classify(Document document)
{
var text = document.GetTextAsync().Result;
var span = new TextSpan(0, text.Length);
return Classifier.GetClassifiedSpansAsync(document, span).Result;
}
protected Document AddDocument(Project project, string fileName, string code)
{
var documentId = DocumentId.CreateNewId(project.Id, fileName);
ApplySolutionChanges(s => s.AddDocument(documentId, fileName, code, filePath: fileName));
return workspace.CurrentSolution.GetDocument(documentId);
}
protected virtual void ApplySolutionChanges(Func<Solution, Solution> action)
{
var solution = workspace.CurrentSolution;
solution = action(solution);
workspace.TryApplyChanges(solution);
}
protected MefHostServices GetRoslynCompositionHost()
{
IEnumerable<Assembly> assemblies = MefHostServices.DefaultAssemblies;
var compositionHost = MefHostServices.Create(assemblies);
return compositionHost;
}
protected Project CreateDefaultProject()
{
var solution = workspace.CurrentSolution;
var projectId = ProjectId.CreateNewId();
var projectName = "VBTest";
ProjectInfo projectInfo = ProjectInfo.Create(
projectId,
VersionStamp.Default,
projectName,
projectName,
LanguageNames.VisualBasic,
filePath: null);
ApplySolutionChanges(s => s.AddProject(projectInfo));
return workspace.CurrentSolution.Projects.FirstOrDefault();
}
protected Project InitProject()
{
var host = GetRoslynCompositionHost();
workspace = new AdhocWorkspace(host);
return CreateDefaultProject();
}
}
Update:
Here's a Visual Studio project demonstrating both approaches:
https://drive.google.com/file/d/1LLuzy7yDFAE-v40I7EswECYQSthxheEf/view?usp=sharing
Is there a function built into Java that capitalizes the first character of each word in a String, and does not affect the others?
Examples:
jon skeet -> Jon Skeet
miles o'Brien -> Miles O'Brien (B remains capital, this rules out Title Case)
old mcdonald -> Old Mcdonald*
*(Old McDonald would be find too, but I don't expect it to be THAT smart.)
A quick look at the Java String Documentation reveals only toUpperCase() and toLowerCase(), which of course do not provide the desired behavior. Naturally, Google results are dominated by those two functions. It seems like a wheel that must have been invented already, so it couldn't hurt to ask so I can use it in the future.
WordUtils.capitalize(str) (from apache commons-text)
(Note: if you need "fOO BAr" to become "Foo Bar", then use capitalizeFully(..) instead)
If you're only worried about the first letter of the first word being capitalized:
private String capitalize(final String line) {
return Character.toUpperCase(line.charAt(0)) + line.substring(1);
}
The following method converts all the letters into upper/lower case, depending on their position near a space or other special chars.
public static String capitalizeString(String string) {
char[] chars = string.toLowerCase().toCharArray();
boolean found = false;
for (int i = 0; i < chars.length; i++) {
if (!found && Character.isLetter(chars[i])) {
chars[i] = Character.toUpperCase(chars[i]);
found = true;
} else if (Character.isWhitespace(chars[i]) || chars[i]=='.' || chars[i]=='\'') { // You can add other chars here
found = false;
}
}
return String.valueOf(chars);
}
Try this very simple way
example givenString="ram is good boy"
public static String toTitleCase(String givenString) {
String[] arr = givenString.split(" ");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < arr.length; i++) {
sb.append(Character.toUpperCase(arr[i].charAt(0)))
.append(arr[i].substring(1)).append(" ");
}
return sb.toString().trim();
}
Output will be: Ram Is Good Boy
I made a solution in Java 8 that is IMHO more readable.
public String firstLetterCapitalWithSingleSpace(final String words) {
return Stream.of(words.trim().split("\\s"))
.filter(word -> word.length() > 0)
.map(word -> word.substring(0, 1).toUpperCase() + word.substring(1))
.collect(Collectors.joining(" "));
}
The Gist for this solution can be found here: https://gist.github.com/Hylke1982/166a792313c5e2df9d31
String toBeCapped = "i want this sentence capitalized";
String[] tokens = toBeCapped.split("\\s");
toBeCapped = "";
for(int i = 0; i < tokens.length; i++){
char capLetter = Character.toUpperCase(tokens[i].charAt(0));
toBeCapped += " " + capLetter + tokens[i].substring(1);
}
toBeCapped = toBeCapped.trim();
I've written a small Class to capitalize all the words in a String.
Optional multiple delimiters, each one with its behavior (capitalize before, after, or both, to handle cases like O'Brian);
Optional Locale;
Don't breaks with Surrogate Pairs.
LIVE DEMO
Output:
====================================
SIMPLE USAGE
====================================
Source: cApItAlIzE this string after WHITE SPACES
Output: Capitalize This String After White Spaces
====================================
SINGLE CUSTOM-DELIMITER USAGE
====================================
Source: capitalize this string ONLY before'and''after'''APEX
Output: Capitalize this string only beforE'AnD''AfteR'''Apex
====================================
MULTIPLE CUSTOM-DELIMITER USAGE
====================================
Source: capitalize this string AFTER SPACES, BEFORE'APEX, and #AFTER AND BEFORE# NUMBER SIGN (#)
Output: Capitalize This String After Spaces, BeforE'apex, And #After And BeforE# Number Sign (#)
====================================
SIMPLE USAGE WITH CUSTOM LOCALE
====================================
Source: Uniforming the first and last vowels (different kind of 'i's) of the Turkish word D[İ]YARBAK[I]R (DİYARBAKIR)
Output: Uniforming The First And Last Vowels (different Kind Of 'i's) Of The Turkish Word D[i]yarbak[i]r (diyarbakir)
====================================
SIMPLE USAGE WITH A SURROGATE PAIR
====================================
Source: ab 𐐂c de à
Output: Ab 𐐪c De À
Note: first letter will always be capitalized (edit the source if you don't want that).
Please share your comments and help me to found bugs or to improve the code...
Code:
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;
public class WordsCapitalizer {
public static String capitalizeEveryWord(String source) {
return capitalizeEveryWord(source,null,null);
}
public static String capitalizeEveryWord(String source, Locale locale) {
return capitalizeEveryWord(source,null,locale);
}
public static String capitalizeEveryWord(String source, List<Delimiter> delimiters, Locale locale) {
char[] chars;
if (delimiters == null || delimiters.size() == 0)
delimiters = getDefaultDelimiters();
// If Locale specified, i18n toLowerCase is executed, to handle specific behaviors (eg. Turkish dotted and dotless 'i')
if (locale!=null)
chars = source.toLowerCase(locale).toCharArray();
else
chars = source.toLowerCase().toCharArray();
// First charachter ALWAYS capitalized, if it is a Letter.
if (chars.length>0 && Character.isLetter(chars[0]) && !isSurrogate(chars[0])){
chars[0] = Character.toUpperCase(chars[0]);
}
for (int i = 0; i < chars.length; i++) {
if (!isSurrogate(chars[i]) && !Character.isLetter(chars[i])) {
// Current char is not a Letter; gonna check if it is a delimitrer.
for (Delimiter delimiter : delimiters){
if (delimiter.getDelimiter()==chars[i]){
// Delimiter found, applying rules...
if (delimiter.capitalizeBefore() && i>0
&& Character.isLetter(chars[i-1]) && !isSurrogate(chars[i-1]))
{ // previous character is a Letter and I have to capitalize it
chars[i-1] = Character.toUpperCase(chars[i-1]);
}
if (delimiter.capitalizeAfter() && i<chars.length-1
&& Character.isLetter(chars[i+1]) && !isSurrogate(chars[i+1]))
{ // next character is a Letter and I have to capitalize it
chars[i+1] = Character.toUpperCase(chars[i+1]);
}
break;
}
}
}
}
return String.valueOf(chars);
}
private static boolean isSurrogate(char chr){
// Check if the current character is part of an UTF-16 Surrogate Pair.
// Note: not validating the pair, just used to bypass (any found part of) it.
return (Character.isHighSurrogate(chr) || Character.isLowSurrogate(chr));
}
private static List<Delimiter> getDefaultDelimiters(){
// If no delimiter specified, "Capitalize after space" rule is set by default.
List<Delimiter> delimiters = new ArrayList<Delimiter>();
delimiters.add(new Delimiter(Behavior.CAPITALIZE_AFTER_MARKER, ' '));
return delimiters;
}
public static class Delimiter {
private Behavior behavior;
private char delimiter;
public Delimiter(Behavior behavior, char delimiter) {
super();
this.behavior = behavior;
this.delimiter = delimiter;
}
public boolean capitalizeBefore(){
return (behavior.equals(Behavior.CAPITALIZE_BEFORE_MARKER)
|| behavior.equals(Behavior.CAPITALIZE_BEFORE_AND_AFTER_MARKER));
}
public boolean capitalizeAfter(){
return (behavior.equals(Behavior.CAPITALIZE_AFTER_MARKER)
|| behavior.equals(Behavior.CAPITALIZE_BEFORE_AND_AFTER_MARKER));
}
public char getDelimiter() {
return delimiter;
}
}
public static enum Behavior {
CAPITALIZE_AFTER_MARKER(0),
CAPITALIZE_BEFORE_MARKER(1),
CAPITALIZE_BEFORE_AND_AFTER_MARKER(2);
private int value;
private Behavior(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
Using org.apache.commons.lang.StringUtils makes it very simple.
capitalizeStr = StringUtils.capitalize(str);
From Java 9+
you can use String::replaceAll like this :
public static void upperCaseAllFirstCharacter(String text) {
String regex = "\\b(.)(.*?)\\b";
String result = Pattern.compile(regex).matcher(text).replaceAll(
matche -> matche.group(1).toUpperCase() + matche.group(2)
);
System.out.println(result);
}
Example :
upperCaseAllFirstCharacter("hello this is Just a test");
Outputs
Hello This Is Just A Test
With this simple code:
String example="hello";
example=example.substring(0,1).toUpperCase()+example.substring(1, example.length());
System.out.println(example);
Result: Hello
I'm using the following function. I think it is faster in performance.
public static String capitalize(String text){
String c = (text != null)? text.trim() : "";
String[] words = c.split(" ");
String result = "";
for(String w : words){
result += (w.length() > 1? w.substring(0, 1).toUpperCase(Locale.US) + w.substring(1, w.length()).toLowerCase(Locale.US) : w) + " ";
}
return result.trim();
}
Use the Split method to split your string into words, then use the built in string functions to capitalize each word, then append together.
Pseudo-code (ish)
string = "the sentence you want to apply caps to";
words = string.split(" ")
string = ""
for(String w: words)
//This line is an easy way to capitalize a word
word = word.toUpperCase().replace(word.substring(1), word.substring(1).toLowerCase())
string += word
In the end string looks something like
"The Sentence You Want To Apply Caps To"
This might be useful if you need to capitalize titles. It capitalizes each substring delimited by " ", except for specified strings such as "a" or "the". I haven't ran it yet because it's late, should be fine though. Uses Apache Commons StringUtils.join() at one point. You can substitute it with a simple loop if you wish.
private static String capitalize(String string) {
if (string == null) return null;
String[] wordArray = string.split(" "); // Split string to analyze word by word.
int i = 0;
lowercase:
for (String word : wordArray) {
if (word != wordArray[0]) { // First word always in capital
String [] lowercaseWords = {"a", "an", "as", "and", "although", "at", "because", "but", "by", "for", "in", "nor", "of", "on", "or", "so", "the", "to", "up", "yet"};
for (String word2 : lowercaseWords) {
if (word.equals(word2)) {
wordArray[i] = word;
i++;
continue lowercase;
}
}
}
char[] characterArray = word.toCharArray();
characterArray[0] = Character.toTitleCase(characterArray[0]);
wordArray[i] = new String(characterArray);
i++;
}
return StringUtils.join(wordArray, " "); // Re-join string
}
public static String toTitleCase(String word){
return Character.toUpperCase(word.charAt(0)) + word.substring(1);
}
public static void main(String[] args){
String phrase = "this is to be title cased";
String[] splitPhrase = phrase.split(" ");
String result = "";
for(String word: splitPhrase){
result += toTitleCase(word) + " ";
}
System.out.println(result.trim());
}
1. Java 8 Streams
public static String capitalizeAll(String str) {
if (str == null || str.isEmpty()) {
return str;
}
return Arrays.stream(str.split("\\s+"))
.map(t -> t.substring(0, 1).toUpperCase() + t.substring(1))
.collect(Collectors.joining(" "));
}
Examples:
System.out.println(capitalizeAll("jon skeet")); // Jon Skeet
System.out.println(capitalizeAll("miles o'Brien")); // Miles O'Brien
System.out.println(capitalizeAll("old mcdonald")); // Old Mcdonald
System.out.println(capitalizeAll(null)); // null
For foo bAR to Foo Bar, replace the map() method with the following:
.map(t -> t.substring(0, 1).toUpperCase() + t.substring(1).toLowerCase())
2. String.replaceAll() (Java 9+)
ublic static String capitalizeAll(String str) {
if (str == null || str.isEmpty()) {
return str;
}
return Pattern.compile("\\b(.)(.*?)\\b")
.matcher(str)
.replaceAll(match -> match.group(1).toUpperCase() + match.group(2));
}
Examples:
System.out.println(capitalizeAll("12 ways to learn java")); // 12 Ways To Learn Java
System.out.println(capitalizeAll("i am atta")); // I Am Atta
System.out.println(capitalizeAll(null)); // null
3. Apache Commons Text
System.out.println(WordUtils.capitalize("love is everywhere")); // Love Is Everywhere
System.out.println(WordUtils.capitalize("sky, sky, blue sky!")); // Sky, Sky, Blue Sky!
System.out.println(WordUtils.capitalize(null)); // null
For titlecase:
System.out.println(WordUtils.capitalizeFully("fOO bAR")); // Foo Bar
System.out.println(WordUtils.capitalizeFully("sKy is BLUE!")); // Sky Is Blue!
For details, checkout this tutorial.
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the sentence : ");
try
{
String str = br.readLine();
char[] str1 = new char[str.length()];
for(int i=0; i<str.length(); i++)
{
str1[i] = Character.toLowerCase(str.charAt(i));
}
str1[0] = Character.toUpperCase(str1[0]);
for(int i=0;i<str.length();i++)
{
if(str1[i] == ' ')
{
str1[i+1] = Character.toUpperCase(str1[i+1]);
}
System.out.print(str1[i]);
}
}
catch(Exception e)
{
System.err.println("Error: " + e.getMessage());
}
I decided to add one more solution for capitalizing words in a string:
words are defined here as adjacent letter-or-digit characters;
surrogate pairs are provided as well;
the code has been optimized for performance; and
it is still compact.
Function:
public static String capitalize(String string) {
final int sl = string.length();
final StringBuilder sb = new StringBuilder(sl);
boolean lod = false;
for(int s = 0; s < sl; s++) {
final int cp = string.codePointAt(s);
sb.appendCodePoint(lod ? Character.toLowerCase(cp) : Character.toUpperCase(cp));
lod = Character.isLetterOrDigit(cp);
if(!Character.isBmpCodePoint(cp)) s++;
}
return sb.toString();
}
Example call:
System.out.println(capitalize("An à la carte StRiNg. Surrogate pairs: 𐐪𐐪."));
Result:
An À La Carte String. Surrogate Pairs: 𐐂𐐪.
Use:
String text = "jon skeet, miles o'brien, old mcdonald";
Pattern pattern = Pattern.compile("\\b([a-z])([\\w]*)");
Matcher matcher = pattern.matcher(text);
StringBuffer buffer = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(buffer, matcher.group(1).toUpperCase() + matcher.group(2));
}
String capitalized = matcher.appendTail(buffer).toString();
System.out.println(capitalized);
There are many way to convert the first letter of the first word being capitalized. I have an idea. It's very simple:
public String capitalize(String str){
/* The first thing we do is remove whitespace from string */
String c = str.replaceAll("\\s+", " ");
String s = c.trim();
String l = "";
for(int i = 0; i < s.length(); i++){
if(i == 0){ /* Uppercase the first letter in strings */
l += s.toUpperCase().charAt(i);
i++; /* To i = i + 1 because we don't need to add
value i = 0 into string l */
}
l += s.charAt(i);
if(s.charAt(i) == 32){ /* If we meet whitespace (32 in ASCII Code is whitespace) */
l += s.toUpperCase().charAt(i+1); /* Uppercase the letter after whitespace */
i++; /* Yo i = i + 1 because we don't need to add
value whitespace into string l */
}
}
return l;
}
package com.test;
/**
* #author Prasanth Pillai
* #date 01-Feb-2012
* #description : Below is the test class details
*
* inputs a String from a user. Expect the String to contain spaces and alphanumeric characters only.
* capitalizes all first letters of the words in the given String.
* preserves all other characters (including spaces) in the String.
* displays the result to the user.
*
* Approach : I have followed a simple approach. However there are many string utilities available
* for the same purpose. Example : WordUtils.capitalize(str) (from apache commons-lang)
*
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Test {
public static void main(String[] args) throws IOException{
System.out.println("Input String :\n");
InputStreamReader converter = new InputStreamReader(System.in);
BufferedReader in = new BufferedReader(converter);
String inputString = in.readLine();
int length = inputString.length();
StringBuffer newStr = new StringBuffer(0);
int i = 0;
int k = 0;
/* This is a simple approach
* step 1: scan through the input string
* step 2: capitalize the first letter of each word in string
* The integer k, is used as a value to determine whether the
* letter is the first letter in each word in the string.
*/
while( i < length){
if (Character.isLetter(inputString.charAt(i))){
if ( k == 0){
newStr = newStr.append(Character.toUpperCase(inputString.charAt(i)));
k = 2;
}//this else loop is to avoid repeatation of the first letter in output string
else {
newStr = newStr.append(inputString.charAt(i));
}
} // for the letters which are not first letter, simply append to the output string.
else {
newStr = newStr.append(inputString.charAt(i));
k=0;
}
i+=1;
}
System.out.println("new String ->"+newStr);
}
}
Here is a simple function
public static String capEachWord(String source){
String result = "";
String[] splitString = source.split(" ");
for(String target : splitString){
result += Character.toUpperCase(target.charAt(0))
+ target.substring(1) + " ";
}
return result.trim();
}
This is just another way of doing it:
private String capitalize(String line)
{
StringTokenizer token =new StringTokenizer(line);
String CapLine="";
while(token.hasMoreTokens())
{
String tok = token.nextToken().toString();
CapLine += Character.toUpperCase(tok.charAt(0))+ tok.substring(1)+" ";
}
return CapLine.substring(0,CapLine.length()-1);
}
Reusable method for intiCap:
public class YarlagaddaSireeshTest{
public static void main(String[] args) {
String FinalStringIs = "";
String testNames = "sireesh yarlagadda test";
String[] name = testNames.split("\\s");
for(String nameIs :name){
FinalStringIs += getIntiCapString(nameIs) + ",";
}
System.out.println("Final Result "+ FinalStringIs);
}
public static String getIntiCapString(String param) {
if(param != null && param.length()>0){
char[] charArray = param.toCharArray();
charArray[0] = Character.toUpperCase(charArray[0]);
return new String(charArray);
}
else {
return "";
}
}
}
Here is my solution.
I ran across this problem tonight and decided to search it. I found an answer by Neelam Singh that was almost there, so I decided to fix the issue (broke on empty strings) and caused a system crash.
The method you are looking for is named capString(String s) below.
It turns "It's only 5am here" into "It's Only 5am Here".
The code is pretty well commented, so enjoy.
package com.lincolnwdaniel.interactivestory.model;
public class StringS {
/**
* #param s is a string of any length, ideally only one word
* #return a capitalized string.
* only the first letter of the string is made to uppercase
*/
public static String capSingleWord(String s) {
if(s.isEmpty() || s.length()<2) {
return Character.toUpperCase(s.charAt(0))+"";
}
else {
return Character.toUpperCase(s.charAt(0)) + s.substring(1);
}
}
/**
*
* #param s is a string of any length
* #return a title cased string.
* All first letter of each word is made to uppercase
*/
public static String capString(String s) {
// Check if the string is empty, if it is, return it immediately
if(s.isEmpty()){
return s;
}
// Split string on space and create array of words
String[] arr = s.split(" ");
// Create a string buffer to hold the new capitalized string
StringBuffer sb = new StringBuffer();
// Check if the array is empty (would be caused by the passage of s as an empty string [i.g "" or " "],
// If it is, return the original string immediately
if( arr.length < 1 ){
return s;
}
for (int i = 0; i < arr.length; i++) {
sb.append(Character.toUpperCase(arr[i].charAt(0)))
.append(arr[i].substring(1)).append(" ");
}
return sb.toString().trim();
}
}
Here we go for perfect first char capitalization of word
public static void main(String[] args) {
String input ="my name is ranjan";
String[] inputArr = input.split(" ");
for(String word : inputArr) {
System.out.println(word.substring(0, 1).toUpperCase()+word.substring(1,word.length()));
}
}
}
//Output : My Name Is Ranjan
For those of you using Velocity in your MVC, you can use the capitalizeFirstLetter() method from the StringUtils class.
String s="hi dude i want apple";
s = s.replaceAll("\\s+"," ");
String[] split = s.split(" ");
s="";
for (int i = 0; i < split.length; i++) {
split[i]=Character.toUpperCase(split[i].charAt(0))+split[i].substring(1);
s+=split[i]+" ";
System.out.println(split[i]);
}
System.out.println(s);
package corejava.string.intern;
import java.io.DataInputStream;
import java.util.ArrayList;
/*
* wap to accept only 3 sentences and convert first character of each word into upper case
*/
public class Accept3Lines_FirstCharUppercase {
static String line;
static String words[];
static ArrayList<String> list=new ArrayList<String>();
/**
* #param args
*/
public static void main(String[] args) throws java.lang.Exception{
DataInputStream read=new DataInputStream(System.in);
System.out.println("Enter only three sentences");
int i=0;
while((line=read.readLine())!=null){
method(line); //main logic of the code
if((i++)==2){
break;
}
}
display();
System.out.println("\n End of the program");
}
/*
* this will display all the elements in an array
*/
public static void display(){
for(String display:list){
System.out.println(display);
}
}
/*
* this divide the line of string into words
* and first char of the each word is converted to upper case
* and to an array list
*/
public static void method(String lineParam){
words=line.split("\\s");
for(String s:words){
String result=s.substring(0,1).toUpperCase()+s.substring(1);
list.add(result);
}
}
}
If you prefer Guava...
String myString = ...;
String capWords = Joiner.on(' ').join(Iterables.transform(Splitter.on(' ').omitEmptyStrings().split(myString), new Function<String, String>() {
public String apply(String input) {
return Character.toUpperCase(input.charAt(0)) + input.substring(1);
}
}));
String toUpperCaseFirstLetterOnly(String str) {
String[] words = str.split(" ");
StringBuilder ret = new StringBuilder();
for(int i = 0; i < words.length; i++) {
ret.append(Character.toUpperCase(words[i].charAt(0)));
ret.append(words[i].substring(1));
if(i < words.length - 1) {
ret.append(' ');
}
}
return ret.toString();
}
I have a strange problem (at least it appears that way) that when searching for a string in a textPane, I get an extra index for each line number that is searched and returned when using StyledDoc verses just getting the text from a textPane. I get the same text from the same pane, it's just that one is from the plain text the other is from the styled doc. Am I missing something here. I'll try to list as many of the changes between the two versions I am working with.
The plain text version:
public int displayXMLFile(String path, int target){
InputStreamReader inputStream;
FileInputStream fileStream;
BufferedReader buffReader;
if(target == 1){
try{
File file = new File(path);
fileStream = new FileInputStream(file);
inputStream = new InputStreamReader(fileStream,"UTF-8");
buffReader = new BufferedReader(inputStream);
StringBuffer content = new StringBuffer("");
String line = "";
while((line = buffReader.readLine())!=null){
content.append(line+"\n");
}
buffReader.close();
xhw.txtDisplay_1.setText(content.toString());
}
catch(Exception e){
e.printStackTrace();
return -1;
}
}
}
verses the Styled Doc (without the styles applied)
protected void openFile(String path, StyledDocument sDoc, int target)
throws BadLocationException {
FileInputStream fileStream;
String file;
if(target == 1){
file = "Openning First File";
} else {
file = "Openning Second File";
}
try {
fileStream = new FileInputStream(path);
// Get the object of DataInputStream
//DataInputStream in = new DataInputStream(fileStream);
ProgressMonitorInputStream in = new ProgressMonitorInputStream(
xw.getContentPane(), file, fileStream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
//Read File Line By Line
while ((strLine = br.readLine()) != null) {
sDoc.insertString(sDoc.getLength(), strLine + "\n", sDoc.getStyle("regular"));
xw.updateProgress(target);
}
//Close the input stream
in.close();
} catch (Exception e){//Catch exception if any
System.err.println("Error: " + e.getMessage());
}
This is how I search:
public int searchText(int sPos, int target) throws BadLocationException{
String search = xhw.textSearch.getText();
String contents;
JTextPane searchPane;
if(target == 1){
searchPane = xhw.txtDisplay_1;
} else {
searchPane = xhw.txtDisplay_2;
}
if(xhw.textSearch.getText().isEmpty()){
xhw.displayDialog("Nothing to search for");
highlight(searchPane, null, 0,0);
} else {
contents = searchPane.getText();
// Search for the desired string starting at cursor position
int newPos = contents.indexOf( search, sPos );
// cycle cursor to beginning of doc window
if (newPos == -1 && sPos > 0){
sPos = 0;
newPos = contents.indexOf( search, sPos );
}
if ( newPos >= 0 ) {
// Select occurrence if found
highlight(searchPane, contents, newPos, target);
sPos = newPos + search.length()+1;
} else {
xhw.displayDialog("\"" + search + "\"" + " was not found in File " + target);
}
}
return sPos;
}
The sample file:
<?xml version="1.0" encoding="UTF-8"?>
<AlternateDepartureRoutes>
<AlternateDepartureRoute>
<AdrName>BOIRR</AdrName>
<AdrRouteAlpha>..BROPH..</AdrRouteAlpha>
<TransitionFix>
<FixName>BROPH</FixName>
</TransitionFix>
</AlternateDepartureRoute>
<AlternateDepartureRoute>
</AlternateDepartureRoutes>
And my highlighter:
public void highlight(JTextPane tPane, String text, int position, int target) throws BadLocationException {
Highlighter highlighter = new DefaultHighlighter();
Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(Color.LIGHT_GRAY);
tPane.setHighlighter(highlighter);
String searchText = xhw.textSearch.getText();
String document = tPane.getText();
int startOfSString = document.indexOf(searchText,position);
if(startOfSString >= 0){
int endOfSString = startOfSString + searchText.length();
highlighter.addHighlight(startOfSString, endOfSString, painter);
tPane.setCaretPosition(endOfSString);
int caretPos = tPane.getCaretPosition();
javax.swing.text.Element root = tPane.getDocument().getDefaultRootElement();
int lineNum = root.getElementIndex(caretPos) +1;
if (target == 1){
xhw.txtLineNum1.setText(Integer.toString(lineNum));
} else if (target == 2){
xhw.txtLineNum2.setText(Integer.toString(lineNum));
} else {
xhw.txtLineNum1.setText(null);
xhw.txtLineNum2.setText(null);
}
} else {
highlighter.removeAllHighlights();
}
}
When I do a search for Alt with the indexof() I get 40 for the plain text (which is what it should return) and 41 when searching with the styled doc. And for each additional line that Alt appears on I get and extra index (so that the indexof() call returns 2 more then needed in line 3). This happens for every additional line that it finds. Am I missing something obvious? (If I need to push this to a smaller single class to make it easier to check I can do this later when I have some more time).
Thanks in advance...
If you are on Windows, then the TextComponent text (searchPane.getText()) can contain carriage-return+newline characters (\r\n), but the TextComponent's Styled Document (sSearchPane.getText(0, sSearchPane.getLength())) contains only newline characters (\n). That's why your newPos is always larger than newPosS by the number of newlines at that point. To fix this, in your search function you can change:
contents = searchPane.getText();
to:
contents = searchPane.getText().replaceAll("\r\n","\n");
That way the search occurs with the same indices that the Styled Document is using.
OK I have found a solution (basicly). I approached this from the aspect that I am getting text from the same text componet in two different ways...
String search = xw.textSearch.getText();
String contents;
String contentsS;
JTextPane searchPane;
StyledDocument sSearchPane;
searchPane = xw.txtDisplay_left;
sSearchPane = xw.txtDisplay_left.getStyledDocument();
contents = searchPane.getText();
contentsS = sSearchPane.getText(0, sSearchPane.getLength());
// Search for the desired string starting at cursor position
int newPos = contents.indexOf( search, sPos );
int newPosS = contentsS.indexOf(search, sPos);
So when comparing the two variables "newPos" & "newPosS", newPos retruned 1 more then newPosS for each line that the search string was found on. So when looking at the sample file and searching for "Alt" the first instance is found on line 2. "newPos" returns 41 and "newPosS returns 40 (which then highlights the correct text). The next occurance (which is found in line 3) "newPos" returns 71 and "newPosS" returns 69. As you can see, every new line increases the count by the line number the occurance begins in. I would suspect that there is an extra character being added in for each new line from the textPane that is not present in the StyledDoc.
I'm sure there is a reasonable explaination but I don't have it at this time.