java窗体JFrame

[java]代码库

import javax.swing.*;

import java.util.concurrent.*;

public class HelloLabel {

    public static void main(String[] args) throws Exception

    {

        JFrame frame = new JFrame("Hello Swing");

        JLabel label = new JLabel("A label");

        frame.add(label);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置关闭的事件

        frame.setSize(300, 100); //设置大小

        frame.setVisible(true);//使窗口可视

        TimeUnit.SECONDS.sleep(1);//计时器，停顿一秒

        label.setText("Hey! This is Different!");

    }

}