Question

关于java JFrame

我想知道
当达到某一条件如何弹出警告窗口，然后点击里面的按钮，
JFrame就重置为一开始的状态。。。

谢谢~

Answer 1

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class F1 extends JFrame implements Runnable {
private boolean runnable = true;

public F1() {
super("测试");
this.setSize(400, 300);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}

public static void main(String arg[]) {
new Thread(new F1()).start();
}

public void run() {
while (runnable) {
this.setSize(this.getWidth() + 10, this.getHeight() + 10);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
}
if (this.getWidth() > 600) {
int i = JOptionPane.showConfirmDialog(this, "要回原来吗?", "友情提示",
JOptionPane.YES_NO_OPTION);
if (i == JOptionPane.OK_OPTION) {
this.runnable = false;
this.setSize(400, 300);
}
}
}
}
}