How to change the classpath and run the code in Java?

I was trying to execute the following code in java:

import java.awt.*;
import javax.swing.*;

import org.fife.ui.rtextarea.*;
import org.fife.ui.rsyntaxtextarea.*;

public class TextEditorDemo extends JFrame {

   private static final long serialVersionUID = 1L;


   public TextEditorDemo() {

      JPanel cp = new JPanel(new BorderLayout());

      RSyntaxTextArea textArea = new RSyntaxTextArea();
      textArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA);
      RTextScrollPane sp = new RTextScrollPane(textArea);
      cp.add(sp);

      setContentPane(cp);
      setTitle("RSyntaxTextArea 1.4 - Example 1 - Text Editor Demo");
      setDefaultCloseOperation(EXIT_ON_CLOSE);
      pack();
      setLocationRelativeTo(null);

   }

   public static void main(String[] args) {
      // Start all Swing applications on the EDT.
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            new TextEditorDemo().setVisible(true);
         }
      });
   }

}

Since I'm using RSyntaxTextArea file i have to give the classpath of it while I'm running the code. Assume that my RSyntaxTextArea.jar file is in Anto(i.e. my Home directory in Ubuntu 10.10) and whe开发者_如何学Pythonn I run the above code:

javac -classpath \Anto\RSyntaxTextArea.jar TextEditorDemo.java

Still I'm getting the error as RTextScrollPane could not be found kind of errors. I guess i have been giving my classpath wrongly; What to do?

Thanks for the answer.

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Did you download it from the sourceforge site? It is a zip file containing the sources. Create a folder for containing the sources and unzip it. Run ant in the folder - it will create a rsyntaxtextarea.jar in the dist folder. Add this to the class path.

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Assuming that /Anto is really your home directory, try this:

javac -classpath ~/RSyntaxTextArea.jar TextEditorDemo.java

Otherwise, just point to a relative path to the jar file. For one thing, you were trying to use \, where in Linux you should be using /. You can reference the current directory with . So, if the jar is in your current working directory, you can just do this:

javac -classpath RSyntaxTextArea.jar TextEditorDemo.java

Or this:

javac -classpath ./RSyntaxTextArea.jar TextEditorDemo.java

If the Anto directory is under the current directory, use this:

javac -classpath ./Anto/RSyntaxTextArea.jar TextEditorDemo.java

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Because that's not the path to your home directory, nor the correct slash to use.

javac -classpath /home/Anto/RSyntaxTextArea.jar TextEditorDemo.java

Also note Java 6 allows you to use a wildcard (*) for the path to search for jar files.