psvm + tab would make:
public static void main(String[] args) {
}
And now I want to have cml for:
CommandLineRunner runner () {
return args -> {
};
}
How to add it in IDEA?
Checkout IntelliJ IDEA Live Templates documentation
Basically you can create abbreviations like that :
go to File -> Settings... -> Editor -> Live Templates
Add a live template with the + sign
define at least abbreviation and text template
define the appropriate JAVA context
That's it.
Related
I'm making a basic IntelliJ plugin that lets a user define Run Configuration (following the tutorial at [1]), and use said Run Configurations to execute the file open in the editor on a remote server.
My Run Configuration is simple (3 text fields), and I have it all working, however, after editing the Run Configuration, and click "Apply" or "OK" after changing values, the entered values are lost.
What is the correct way to persist and read-back values (both when the Run Configuration is re-opened as well as when the Run Configuration's Runner invoked)? It looks like I could try to create a custom persistence using [2], however, it seems like the Plugin framework should have a way to handle this already or at least hooks for when Apply/OK is pressed.
[1] https://www.jetbrains.org/intellij/sdk/docs/tutorials/run_configurations.html
[2] https://www.jetbrains.org/intellij/sdk/docs/basics/persisting_state_of_components.html
Hopefully, this post is a bit more clear to those new to IntelliJ plugin development and illustrates how persisting/loading Run Configurations can be achieved. Please read through the code comments as this is where much of the explanation takes place.
Also now that SettingsEditorImpl is my custom implementation of the SettingsEditor abstract class, and likewise, RunConfigurationImpl is my custom implementation of the RunConfigiration abstract class.
The first thing to do is to expose the form fields via custom getters on your SettingsEditorImpl (ie. getHost())
public class SettingsEditorImpl extends SettingsEditor<RunConfigurationImpl> {
private JPanel configurationPanel; // This is the outer-most JPanel
private JTextField hostJTextField;
public SettingsEditorImpl() {
super();
}
#NotNull
#Override
protected JComponent createEditor() {
return configurationPanel;
}
/* Gets the Form fields value */
private String getHost() {
return hostJTextField.getText();
}
/* Copy value FROM your custom runConfiguration back INTO the Form UI; This is to load previously saved values into the Form when it's opened. */
#Override
protected void resetEditorFrom(RunConfigurationImpl runConfiguration) {
hostJTextField.setText(StringUtils.defaultIfBlank(runConfiguration.getHost(), RUN_CONFIGURATION_HOST_DEFAULT));
}
/* Sync the value from the Form UI INTO the RunConfiguration which is what the rest of your code will interact with. This requires a way to set this value on your custom RunConfiguration, ie. RunConfigurationImpl##setHost(host) */
#Override
protected void applyEditorTo(RunConfigurationImpl runConfiguration) throws ConfigurationException {
runConfiguration.setHost(getHost());
}
}
So now, the custom SettingsEditor, which backs the Form UI, is set up to Sync field values In and Out of itself. Remember, the custom RunConfiguration is what is going to actually represent this configuration; the SettingsEditor implementation just represents the FORM (a subtle difference, but important).
Now we need a custom RunConfiguration ...
/* Annotate the class with #State and #Storage, which is used to define how this RunConfiguration's data will be persisted/loaded. */
#State(
name = Constants.PLUGIN_NAME,
storages = {#Storage(Constants.PLUGIN_NAME + "__run-configuration.xml")}
)
public class RunConfigurationImpl extends RunConfigurationBase {
// Its good to 'namespace' keys to your component;
public static final String KEY_HOST = Constants.PLUGIN_NAME + ".host";
private String host;
public RunConfigurationImpl(Project project, ConfigurationFactory factory, String name) {
super(project, factory, name);
}
/* Return an instances of the custom SettingsEditor ... see class defined above */
#NotNull
#Override
public SettingsEditor<? extends RunConfiguration> getConfigurationEditor() {
return new SettingsEditorImpl();
}
/* Return null, else we'll get a Startup/Connection tab in our Run Configuration UI in IntelliJ */
#Nullable
#Override
public SettingsEditor<ConfigurationPerRunnerSettings> getRunnerSettingsEditor(ProgramRunner runner) {
return null;
}
/* This is a pretty cool method. Every time SettingsEditor#applyEditorTo() is changed the values in this class, this method is run and can check/validate any fields! If RuntimeConfigurationException is thrown, the exceptions message is shown at the bottom of the Run Configuration UI in IntelliJ! */
#Override
public void checkConfiguration() throws RuntimeConfigurationException {
if (!StringUtils.startsWithAny(getHost(), "http://", "https://")) {
throw new RuntimeConfigurationException("Invalid host");
}
}
#Nullable
#Override
public RunProfileState getState(#NotNull Executor executor, #NotNull ExecutionEnvironment executionEnvironment) throws ExecutionException {
return null;
}
/* This READS any prior persisted configuration from the State/Storage defined by this classes annotations ... see above.
You must manually read and populate the fields using JDOMExternalizerUtil.readField(..).
This method is invoked at the "right time" by the plugin framework. You dont need to call this.
*/
#Override
public void readExternal(Element element) throws InvalidDataException {
super.readExternal(element);
host = JDOMExternalizerUtil.readField(element, KEY_HOST);
}
/* This WRITES/persists configurations TO the State/Storage defined by this classes annotations ... see above.
You must manually read and populate the fields using JDOMExternalizerUtil.writeField(..).
This method is invoked at the "right time" by the plugin framework. You dont need to call this.
*/
#Override
public void writeExternal(Element element) throws WriteExternalException {
super.writeExternal(element);
JDOMExternalizerUtil.writeField(element, KEY_HOST, host);
}
/* This method is what's used by the rest of the plugin code to access the configured 'host' value. The host field (variable) is written by
1. when writeExternal(..) loads a value from a persisted config.
2. when SettingsEditor#applyEditorTo(..) is called when the Form itself changes.
*/
public String getHost() {
return host;
}
/* This method sets the value, and is primarily used by the custom SettingEditor's SettingsEditor#applyEditorTo(..) method call */
public void setHost(String host) {
this.host = host;
}
}
To read these configuration values elsewhere, say for example a custom ProgramRunner, you would do something like:
final RunConfigurationImpl runConfiguration = (RunConfigurationImpl) executionEnvironment.getRunnerAndConfigurationSettings().getConfiguration();
runConfiguration.getHost(); // Returns the configured host value
See com.intellij.execution.configurations.RunConfigurationBase#readExternal as well as com.intellij.execution.configurations.RunConfigurationBase#loadState and com.intellij.execution.configurations.RunConfigurationBase#writeExternal
Can you help me to run the code? I am trying to execute the following:
public class HelloWorld {
public static void main (String[] args) {
System.out.println("Hello,world!");
}
}
To do that I click Run->Run (the second one with Alt+Shift+F10). It outputs a small window where the only available option is Edit configurations, I tried to do that but with no success.
While editing your first configuration.
Clik + button and choose Application template
In Main class: type HelloWorld or pick it from the picker ...
The following image pretty much illustrates the whole issue:
I have tried using // formatter:off with the appropriate settings, but to no avail. I have also tried looking for indentation rules for lambda expressions/anonymous classes, but I couldn't find those.
Any suggestion is much appreciated!
You need to close the outmost parenthesis right next to the closing bracket for the anonymous class to get the desired indentation.
Instead of:
itemClose.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
}
}
);
Remove the line/space between the last } and ); and you get:
itemClose.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
}
});
What helped for me was setting
Editor > Code Style > Java > Continuation indent to a lower value.
Uncheck the option "Use indents relative to expression start" in
Editor > Code Style > Java
IntelliJ Idea 14.1.1
Select checkbox
"File" [menu]/"Settings"/"Code Style"/"Enable formatter markers in comment"
(see field "Formatter off" and field value, for me it is "#formatter:off")
Then use // #formatter:off in your code.
Example:
// #formatter:off
Observable.create(new Observable.OnSubscribe<Path>() {
#Override
public void call(Subscriber<? super Path> subscriber) {
try (DirectoryStream<Path> stream = Files.newDirectoryStream(rootDir, filePattern)) {
for (Path path : stream) subscriber.onNext(path);
} catch (IOException e) {
System.err.println(e.getMessage());
subscriber.onError(e);
}
subscriber.onCompleted();
}
});
What did the trick for me was disabling the EditorConfig support:
File/Settings/Editor/Code Style: uncheck Enable EditorConfig support.
The new object is a call argument. Disable 'align when multiline' for 'method call arguments' will do the none indented formatting. This does also work for lambdas.
I noticed that when I hover my mouse over a local variable when my debugger is stopped inside a lambda it will report Cannot find local variable 'variable_name' even if it's visible inside the lambda and it's used.
Example code
public class Main {
public static void main(String[] args) {
String a = "hello_world";
m1(a);
}
private static void m1(String a) {
AccessController.doPrivileged((PrivilegedAction<String>) () -> {
System.out.println("blala " + a);
return "abc";
});
}
}
Try with a breakpoint in System.out.println("blala " + a); and after return "abc" and it always report the same error.
I used AccessController.doPrivileged because it's what I used in my original code and of course i'm using Java 8.
It says the same thing in Watchers and Evaluate Expression.
I tried using the "anonymous class" version and the debugger sees the value of a correctly
private static void m1(String a) {
AccessController.doPrivileged(new PrivilegedAction<String>() {
#Override
public String run() {
System.out.println("blala " + a);
return "abc";
}
});
}
I'm missing something about lambda expressions or it's an IntellIJ IDEA 14 bug?
I don't want to report the bug right now because I already reported a bug that was caused by my code instead of IntellIJ IDEA, so I want to be sure before do something (and because I don't use Java 8 so often, so I could be wrong).
This appears to be a know issue. According to JetBrains the root causes of this behavior is with the JDK. For more info see: IDEA-126257
I can confirm what is written in IDEA bug report linked by Mike Rylander: this is a JDK bug and update to version 8u60_25 of the JDK solves it.
I created a project, it asked me to select JDK version and finish.
I couldn't find system namespace in autocomplete.
I typed it manually but IDEA told me that system doesn't exist.
It's System (with a cap)
Some very useful shortcuts:
soutm (+TAB) ==> System.out.println("Class.And.Method.Name")
soutv (+TAB) ==> System.out.println("Last variable used = " + value);
sout (+TAB) ==> System.out.println();
I really love IntelliJ. Glad I moved to it from Eclipse a couple of years ago ;)
Just type sout.
public class Main {
public static void main(String[] args) {
int data = 1;
System.out.println(); ===>sout
System.out.println("Main.main"); ===>soutm
System.out.println("args = [" + args + "]"); ===>soutp
System.out.println("data = " + data); ===>soutv
}
}
sout - just print System.out.println()
soutm - added Class name & method name
soutp - added parameter
soutv - added last variable name
We can change the auto complete settings to to ignore case. Go to:
File -> Settings... -> IDE Settings -> Editor -> Code Completion
and change 'Case sensitive completion' to 'None'.
I came from eclipse and was using the syso shortcut, so I have just added it to my live template. Here is a templete:
System.out.println($END$);
Here is a screenshot:
Don't forget to add Java as applicable context (at the bottom of the window).
Now it will appear as a hint while you typing syso here is a screenshot:
Hope it helps
This can also happen because user has not created any main function or trying to test this directly in class without any function