I am trying to implement a example given in the following tutorial:
enter link description here
I have been trying to execute this program.However I am stuck on an step which is to "Then place the .class file in the (current_directory)/org/wg3i/test/ directory.".So, when I made a Java file from BlueJ I have the .class file however I am not sure how I can place that file in (current_directory)/org/wg3i/test/ directory.Also where exactly is this directory located.
Additional Question:
I am trying to implement the following code.
import org.nlogo.headless.HeadlessWorkspace;
public class Example2 {
public static void main(String[] argv) {
HeadlessWorkspace workspace =
HeadlessWorkspace.newInstance() ;
try {
workspace.open(
"models/Sample Models/Earth Science/"
+ "Fire.nlogo");
workspace.command("set density 62");
workspace.command("random-seed 0");
workspace.command("setup");
workspace.command("repeat 50 [ go ]") ;
System.out.println(
workspace.report("burned-trees"));
workspace.dispose();
}
catch(Exception ex) {
ex.printStackTrace();
}
}
}
which is given in the following linkenter link description here
However, whenever I try to execute this java code using javac I get an error saying package org.nlogo.headless.HeadlessWorkspace doesn't exist and also says HeadlessWorkspace doesn't exist for line 4th.
I know that the link I inserted says this:
In order to compile and run this, NetLogo.jar must be in your classpath. The lib directory, containing additional required libraries, must also be present.
But I am not sure what it exactly asks me to do.
Also, I am working in Linux.
Related
Is it possible for codelets to reference code in other files, like header files?
If I have a codelet file
//FileA.cpp
#include "FileB.h"
class SomeCustomVertex : public Vertex {
public:
bool compute() {
int a = SomeConstantDefinedInFileB;
}
...
}
and some other "codelet" file
//FileB.h
const int SomeConstantDefineInFileB = 42;
and in the host graph program:
graph.addCodelets({"codelets/FileA.cpp", "codelets/FileB.h"});
I get a compile error from popc:
fatal error: 'FileB.h' file not found
#include "FileB.h"
^~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
terminate called after throwing an instance of 'poplar::graph_program_compilation_error'
what(): Codelet compilation failed (see compiler output for details)
I figured this out.
Graph::addCodelets has a parameter StringRef compileFlags = "", which you can use to inject compiler options.
popc --help shows an option
-I arg Add directory to include search path
So when I use graph.addCodelets({"codelets/FileA.cpp"}, "-I codelets"); in the host program, and have my codelets in 'codelets' subdirectory, this works. No need to explicitly list the ".h" files in the arguments.
Incidentally, also a good way to ensure compiler optimisation (-O3) for the custom codelets.
I am new to JavaFX coding (in IntelliJ IDEA), and have been reading / searching all over on how to swap scenes in the main controller / container. I found jewelsea's answer in another thread (Loading new fxml in the same scene), but am receiving an error on the following code.
public static void loadVista(String fxml) {
try {
mainController.setVista(
FXMLLoader.load(VistaNavigator.class.getResource(fxml)));
} catch (IOException e) {
e.printStackTrace();
}
}
The error I am receiving is the following:
Error:(56, 27) java: method setVista in class sample.MainController cannot be applied to given types;
required: javafx.scene.Node
found: java.lang.Object
reason: actual argument java.lang.Object cannot be converted to javafx.scene.Node by method invocation conversion
I know other people have gotten this to work, but all I have done is create a new project and copy the code. Can anyone help me?
It looks like you are trying to compile this with JDK 1.7: the code will only work in JDK 1.8 (the difference here being the enhanced type inference for generic methods introduced in JDK 1.8).
You should configure IntelliJ to use JDK 1.8 instead of 1.7.
If you want to try to revert the code to be JDK 1.7 compatible, you can try to replace it with
public static void loadVista(String fxml) {
try {
mainController.setVista(
FXMLLoader.<Node>load(VistaNavigator.class.getResource(fxml)));
} catch (IOException e) {
e.printStackTrace();
}
}
(with the appropriate import javafx.scene.Node ;, if needed). Of course, there may be other incompatibilities since the code you are using is targeted at JDK 1.8.
I can include the full Greet.java file
public class Greet {
public static void main(String[] args) {
System.out.println("Hello World!");
}
}
from within the asciidoc file
== Hello Java
This is how one greets in Java:
[source,java]
.Greet.java
----
include::Greet.java
----
producing the documentation
But suppose that I only want to include an excerpt from the code delimited by tags. In the code above, suppose I only want to include the main function.
I don't see symbolic tags in the documentation, but this page suggests that it's sufficient to write
public class Greet {
// tag::helloMethod[]
public static void main(String[] args) {
System.out.println("Hello World!");
}
// end::helloMethod[]
}
and
== Hello Java
This is how one greets in Java:
[source,java]
.Greet.java
----
include::Greet.java[tags=helloMethod]
----
That just produces:
Can you suggest a method that would include just the excerpt? I'm using asciidoc 8.6.9.
What you're doing should work fine in Asciidoctor (the Ruby implementation of AsciiDoc), but not AsciiDoc (the Python implementation).
Notice though the different mechanism for obtaining syntax highlighting.
To get syntax highlighting with asciidoc one uses a command-line switch asciidoc -a source-highlighter=pygments file.adoc.
No command-line switch is needed (or possible) with Asciidoctor. With AsciiDoctor syntax highlighting is obtained by:
Inserting :source-highlighter: pygments at the top of each source file, and
Running sudo gem install pygments.rb to install pygments.
The Asciidoctor tags option can include multiple tags as well;
[tags="tag 1, tag 2, …"]
Bringing in more code excerpts in one go…
I have written a unit test with MD 2.8.5 in a project that includes System.Core and with build target Mono/.NET 3.5. I really like the Assert.Throws of the newer NUnit, so decided to write an extension method for it. I created a new file with this as its content in the same namespace as the test. Can anyone see my error?
public delegate void TestDelegate();
public static class AssertThrows
{
public static T Throws<T>(this Assert assert, TestDelegate td)
where T : Exception
{
try
{
td();
}
catch(T e)
{
return e;
}
catch
{
throw new AssertionException("Wrong exception type.");
}
throw new AssertionException("Did not throw an error.");
}
}
MonoDevelop "sees" the extension method through its code completion. However, the compiler reports:
Performing main compilation...
/Users/shamwow/dev/EngineTests.cs(19,37): error CS0117:
`NUnit.Framework.Assert' does not contain a definition for `Throws'
/Applications/MonoDevelop.app/Contents/MacOS/lib/monodevelop/AddIns/NUnit/nunit.framework.dll (Location of the symbol related to previous error)
Build complete -- 1 error, 0 warnings
(I know MD and Mono are not the same.)
I assume you're trying to use it just as:
Assert.Throws<FooException>(() => ...);
Extension methods don't work like that - they appear to be instance methods on the extended type. As you won't have an instance of Assert, you can't call your extension method like that.
When you install a ClickOnce application, the program runs after the install. Is it possible to install without running?
I know I can use a setup and deployment project and create an installer, but I'd prefer to use ClickOnce.
I guess you could fake it. Introduce an "IsInstalled" boolean property, defaulted to false. Then in Program.cs, change your Main() method to look like this:
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
if (!Properties.Settings.Default.IsInstalled)
{
Properties.Settings.Default.IsInstalled = true;
Properties.Settings.Default.Save();
MessageBox.Show("Install Complete");
return;
}
Application.Run(new Form1());
}
So now when the app is first installed, it checks that property and simply displays a message to the user and then quits.
If you wanted to get tricky then you could look at parsing the Activation URI for the deployment and have a URI parameter which specifies whether the program should run when it's first installed or just close silently.
You can do this by editing the application manifest in Mage. There is a checkbox to stop the application running after installation.
If you are not comfortable editing a manifest manually or with Mage then you can use the built-in deployment class to check whether this is the first time the application has run.
using System.Deployment.Application
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
if (ApplicationDeployment.CurrentDeployment.IsFirstRun)
{
MessageBox.Show("Install Complete");
return;
}
Application.Run(new Form1());
}
After trying all the suggested solutions and still running into the same problems, I fiddled with this for a while and combined several solutions to one that actually works.
The problem with just setting an "isInstalled" property is the value is retained after upgrades, so every time you install the new version, it runs the app again. But using an application manifest file and Mage is just too much work and too complicated just to solve this little problem.
So what I did was acquire the current build # of the running version of the app, save that to a property, then check the property against the running version each time. This works because each publish increments the version #.
1) Change your Assembly version to use wildcards in AssemblyInfo.cs:
[assembly: AssemblyVersion("1.0.*")]
2) If that throws a "Deterministic" error on Build, open your .csproj file and set Deterministic to false in the PropertyGroup section
<Deterministic>false</Deterministic>
3) Add this fool-proof function to acquire the running assembly version:
private Version GetRunningVersion()
{
try
{
return System.Deployment.Application.ApplicationDeployment.CurrentDeployment.CurrentVersion;
}
catch
{
return System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
}
}
4) In your project's properties, open the Settings tab, and add a setting named lastVersion (String, User). Leave the Value empty.
5) Add this property to use to determine whether this is the first time the application is running after installation.
private bool isFirstRun
{
get { return Properties.Settings.Default.lastVersion != GetRunningVersion().ToString(); }
}
6) Then in your code, add this after you check for isFirstRun:
if (isFirstRun)
{
Properties.Settings.Default.lastVersion = GetRunningVersion().ToString();
Properties.Settings.Default.Save();
}