How to run applications??

[kosmokramer]

I am pretty new to java, only having worked with simple applets, but now I am trying to create an application since I have to work with file input (I read that that is the easiest way to do it). My question is now that I have compiled the application (I am assuming I still have to use javac.exe), how do I run it? I know that it will not run in a webpage (by the way, is there any way to get around that?), so how does it run? Thanks for any tips!

P.S. if I upload this applet with the file from which it is supposed to read will it be able to work though the web?

 

[raviparthasarathi]

Hi,
You can run the compiled class files by issuing the command :
java <class name>
By class name I mean you would have saved it as something.java..run it as : java something
By the way I really think you should go through the basics of java by going to some site like

http://java.sun.com

Have fun with java!
Cheers
Ravi

 

[kosmokramer]

Hi, thanks for your help. I have already taken a class on Java, so I know the basic stuff, it is just that we never dealt with applications. Anyways, when I compile the program, the compiler does not complain, the only problem is that when I try to run it as you said, the command prompt gives me the following error:
Exception in thread &quot;main&quot; java.lang.NoClassDefFoundError: FileDemo2

Here's the code just in case I am missing something stupid.

import java.io.*;
import java.awt.*;
import java.awt.event.*;

class FileDemo2 extends Frame implements WindowListener, ActionListener
{
	private TextArea inputTextArea;
	private Button loadButton;
	private BufferedReader inFile;
	private TextField nameField;

	public static void main (String [] args)
	{
		FileDemo2 demo = new FileDemo2();
		demo.setSize(300,400);
		demo.makeGui();
		demo.setVisible(true);
	}

	public void makeGui()
	{
		Panel top = new Panel();
		loadButton = new Button("load");
		top.add(loadButton);
		loadButton.addActionListener(this);
		nameField = new TextField(20);
		top.add(nameField);
		nameField.addActionListener(this);
		add ("North", top);
		inputTextArea = new TextArea(" ", 10, 50);
		add ("Center", inputTextArea);
		addWindowListener(this);
	}

	public void actionPerformed(ActionEvent evt)
	{
		if  (evt.getSource() == loadButton)
		{
			String fileName;
			fileName = nameField.getText();
			try
			{
				inFile = new BufferedReader (new FileReader(fileName));
				inputTextArea.setText( "");
				String line;
				while( (line = inFile.readLine() ) != null)
				{
					inputTextArea.append(line+"\n");
				}
			}

			catch (IOException e)
			{
				System.err.println("Error in file " + fileName + ": " + e.toString() );
				System.exit(1);
			}
		}
	}

	public void windowClosing(WindowEvent e)
	{
		System.exit(0);
	}

	public void windowIconified(WindowEvent e)
	{
	}

	public void windowOpened(WindowEvent e)
	{
	}

	public void windowClosed(WindowEvent e)
	{
	}

	public void windowDeiconified(WindowEvent e)
	{
	}

	public void windowActivated(WindowEvent e)
	{
	}

	public void windowDeactivated(WindowEvent e)
	{
	}

}