java之JFrame

package test;

import java.awt.*;
import javax.swing.*;

public class demo{

public static void main(String[] args){

//Jframe 是可添加Swing的容器类
JFrame jf = new JFrame();

JButton jb = new JButton("点我");

jf.add(jb);

jf.setTitle("你好啊！");
jf.setLocation(100,200);
jf.setSize(300,200) ;

//关闭窗口时保证JVM依然退出
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

jf.setVisible(true) ;

}
}

运行结果：<img src="http://img.blog.csdn.net/20160531150818693?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="" />