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Java - Why doesn't this JFrame work

Posted on 2016-11-19
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Last Modified: 2016-11-20
Hi
I'm trying to do a Jframe that is yellow, and has a text area inside it to display results of  my program's calculations.

The JFrame seems to only consist of the JTextArea, even though the size and positioning are clearly within the frame.

What is going wrong below? Thanks

import java.awt.Color;
import java.awt.*;

import javax.swing.*;


public class FFframe extends JFrame{

	JTextArea ta;
	
	public FFframe() {
		
		this.setSize(900, 900);
		this.setLocation(0, 0);
		this.setBackground(Color.YELLOW);
		
		ta = new JTextArea();
		ta.setLocation(500, 500);
		ta.setSize(200, 200);
		ta.setBackground(Color.WHITE);
		ta.setText("ldksjvhlskjdvhlkasjdhvlkjshzvkljshljkvh");
		add(ta);
		
		this.setVisible(true);
		
		
		
	}
	
	
	public static void main(String[] args) {
		
		new FFframe();
	}

}

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Question by:beavoid
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3 Comments
 
LVL 16

Assisted Solution

by:krakatoa
krakatoa earned 500 total points
ID: 41894482
Use a LayoutManager and add the TextArea to it.
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LVL 16

Accepted Solution

by:
krakatoa earned 500 total points
ID: 41894488
import java.awt.Color;
import java.awt.*;

import javax.swing.*;

 

public class FFframe extends JFrame{

	JTextArea ta;
	
	public FFframe() {
		
		this.setSize(900, 900);
		this.setLocation(0, 0);
		this.setLayout(new BorderLayout());
		this.getContentPane().setBackground(java.awt.Color.YELLOW);
		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		
		ta = new JTextArea();
		ta.setLocation(500, 500);
		ta.setSize(200, 200);
		ta.setBackground(Color.WHITE);
		ta.setText("ldksjvhlskjdvhlkasjdhvlkjshzvkljshljkvh");
		this.add(ta,BorderLayout.WEST);
		
		this.setVisible(true);
		
		
		
	}
	
	
	public static void main(String[] args) {
		
		new FFframe();
	}

}

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Author Closing Comment

by:beavoid
ID: 41895282
Thanks
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