More on graphics - An Introduction to Graphical User Interfaces with Java Swing - page 125

File: its/ResizeDisplay/ResizeFrame.java

package its.ResizeDisplay; 1.

2.
3. import its.SimpleFrame.SimpleFrame;

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public class ResizeFrame extends SimpleFrame{

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7. public ResizeFrame(){

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ResizePanel rp = new ResizePanel();

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this. setSize(500,300);

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this. getContentPane().add(rp);

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}

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}

File: its/ResizeDisplay/ResizePanel.java

package its.ResizeDisplay; 1.

2.
3.

import java.awt.Color;

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import java.awt.Graphics;

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import javax.swing.JPanel;

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public class ResizePanel extends JPanel{

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9. public ResizePanel(){

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this. setBackground(Color.yellow);

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}

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public void paintComponent(Graphics g)

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{

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super. paintComponent(g);

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// get the current dimensions of the panel

int currentWidth = this .getWidth(); 17.

int currentHeight = this .getHeight(); 18.

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// take a third of the current dimensions

int wThird = currentWidth/3; 21.

int hThird = currentHeight/3; 22.

// set color to black 23.