3 replies to this topic

[nolsen01]

I'm currently in class for Data Structures and Algorithms and we are having a little problem our code.

We are using Turbo JBuilder from Borland, it uses the Eclipse IDE.

The following code doesn't show the label or buttons until you try and resize the window. Does anyone have any idea why?

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;



public class SimpleApp extends JFrame implements ActionListener

{

	JLabel lbl = new JLabel("Hello World");

	JButton btn1 = new JButton("Red");

	JButton btn2 = new JButton("Green");

	

	Container content = this.getContentPane();

	

	

	public SimpleApp()

	{

		

		

		this.setDefaultCloseOperation(EXIT_ON_CLOSE);

		this.setLayout(new FlowLayout());

		content.add(lbl);

		content.add(btn1);

		btn1.addActionListener(this);

		content.add(btn2);

		btn2.addActionListener(this);

		this.setVisible(true);

		this.setSize(300,200);

		

	}

	

	

	

	public static void main(String[] args) 

	{

		

		new SimpleApp();

		

				

	}




	public void actionPerformed(ActionEvent e)

	{

		

		JButton b = (JButton) e.getSource();

		

		if(b == btn1)

			lbl.setForeground(Color.RED);

		else

			lbl.setForeground(Color.GREEN);

		

		

	}

	

	


}

[John]

No that is not a Vista issue. Try to pack() your window.

[nolsen01]

pack() did indeed work.

I did not know about that method. its pretty useful. I'm also wondering if resize() would work? eh, I'm not going to worry about it.

Thanks by the way.

[John]

No problem. If I recall, when I was taking Java classes, and was developing in Linux I did not need to pack my window, and then when I started developing in Windows I ran into the same problem. But I'm still not sure if I would call it a Windows issue, as packing your window is the proper way to code.