Sample8

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;

public class Sample8 extends Applet implements ActionListener, MouseListener {
	Button btn;		// ボタン：宣言
	Random rnd;
	Color col;
	int x, y, red, grn, blu;
	boolean flg;
	
	public void init() {	// 初期化処理
		x = -30; y = -30;
		rnd = new Random();
		red = rnd.nextInt(256); grn = rnd.nextInt(256); blu = rnd.nextInt(256);
		flg = false;
		btn = new Button("Clear");
		add(btn);
		btn.addActionListener(this);
		addMouseListener(this);
	}
	public void update(Graphics g) {
		paint(g);
	}
	public void paint(Graphics g) {	// 描画処理
		if (flg == false) {
			g.setColor(col);
			g.fillRoundRect(x-15, y-15, rnd.nextInt(20)+11, rnd.nextInt(20)+11, 5, 5);
		} else {
			g.clearRect(0, 0, 500, 300);
			flg = false;
		}
	}
	public void actionPerformed(ActionEvent e) {	// アクションイベント実行処理
		if (e.getSource() == btn) {		// ボタンが押されたら…
			flg = true;
			repaint();
		}
	}
	public void mouseClicked(MouseEvent e) {
		Point pt = e.getPoint();	// マウスクリック位置取得
		x = pt.x; y = pt.y;
		red = rnd.nextInt(256); grn = rnd.nextInt(256); blu = rnd.nextInt(256);
		col = new Color(red, grn, blu);
		repaint();
	}
	public void mousePressed(MouseEvent e) {}
	public void mouseEntered(MouseEvent e) {}
	public void mouseExited(MouseEvent e) {}
	public void mouseReleased(MouseEvent e) {}
}