javaのことで

質問

---MainPanel.java---
import java.awt.Dimension;
import java.awt.Graphics;

import java.event.MouseEvent;
import java.event.MouseListener;

import javax.swing.JPanel;

import java.util.Random;

public class MainPanel extends JPanel implements MouseListener {

public static final int WIDTH = 640;
public static final int HEIGHT = 480;

private static final int NUM_FILE = 4;

private File[] file;

private int prev;

public MainPanel() {
setPreferredSize(new Dimension(WIDTH, HEIGHT));

file = new File[NUM_FILE];
for (int i = 0; i < NUM_FILE; i++) {
file[i] = new File(i, this);
}

select();

addMouseListener(this);
}

private void clear() {
for (int i = 0; i < NUM_FILE; i++) {
file[i].delete();
}
}

private boolean check(int a, int b) {
return a == b || a == prev || b == prev;
}

private void select() {
Random rand = new Random();
int a, b;

do {
a = rand.nextInt(NUM_FILE);
b = rand.nextInt(NUM_FILE);
} while (check(a, b));

file[a].set(0, 0);
file[b].set(file[a].getX() + file[a].getWith() + File.SPACE, 0);
}

public void paintComponent(Graphics g) {
super.paintComponent(g);

for (int i = 0; i < NUM_FILE; i++) {
if (file[i].isSelected()) {
file[i].draw(g);
}

g.drawString("ファイル" + (i + 1) + " … " + file[i].getCnt(), 0, HEIGHT * 3 / 4 + i * 15);
}
}

public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();

for (int i = 0; i < NUM_FILE; i++) {
if (file[i].isSelected()) { // 表示されていて
// 画像内なら
if (x > file[i].getX() && x < file[i].getX() + file[i].getWidth() &&
y < file[i].getY() && y > file[i].getY() + file[i].getHeight()) {
file[i].count();
prev = i;
clear();
select();
break;
}
}
}
repaint();
}

public void mousePressed(MouseEvent e) {
}

public void mouseReleased(MouseEvent e) {
}

public void mouseEntered(MouseEvent e) {
}

public void mouseExited(MouseEvent e) {
}
}

フレームを用意してMainPanelを付加し,pack();してください.

回答No.1

yamada_g

よくわかりませんが、
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.add(new MainPanel());
frame.pack();
frame.setVisible(true);
}
とか？