★★ Java の宿題ここで答えます Part 66 ★★

★★ Java の宿題ここで答えます Part 66 ★★ at TECH

598:デフォルトの名無しさん
08/12/09 16:55:32
>>597
レイアウトやサイズは適当に
//<APPLET CODE="Hage.class" WIDTH="300" HEIGHT="200"></APPLET>
import java.awt.*;
import java.awt.event.*;
public class Hage extends java.applet.Applet {
private double r = 1;
public void init() {
final Canvas canvas = new Canvas() {
public void paint(Graphics g) {
g.drawRect(10, 10, (int)(60 * r), (int)(60 * r));
}
};
canvas.setPreferredSize(new Dimension(150, 150));
Button buttonA = new Button("A");
buttonA.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { r *= 2; canvas.repaint(); }
});
Button buttonB = new Button("B");
buttonB.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { r *= 0.5; canvas.repaint(); }
});
add(buttonA);
add(buttonB);
add(canvas);
}
}

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