java中swing用法

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Container;

import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

public class FlowLayoutDemo{

private JFrame frame;

private JButton button1,button2,button3,button4;

public static void main(String[]args){

FlowLayoutDemo that=new FlowLayoutDemo();

that.go();

}

public void go(){

frame=new JFrame("Folw Layout");//创建主题实例

Container contenPane=frame.getContentPane();//获得JFamel实例默认的内容窗格，此后可以修改它的布局管理器

contenPane.setBackground(Color.CYAN);//将JFranme实例的背景设置为蓝色

Container contentPane=frame.getContentPane();

contentPane.setLayout(new FlowLayout());

button1=new JButton("OK");

button2=new JButton("Open");

button3=new JButton("Close");

button4=new JButton("点我");

contentPane.add(button1);

contentPane.add(button2);

contentPane.add(button3);

contenPane.add(button1,BorderLayout.SOUTH);

contenPane.add(button2,BorderLayout.EAST);

contenPane.add(button3,BorderLayout.NORTH);

contenPane.add(button4,BorderLayout.WEST);

frame.setSize(200,100);

frame.setVisible(true);

}

}