复杂界面布局

package _7;

import java.awt.BorderLayout;

import java.awt.FlowLayout;

import java.awt.GridLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class ComplexLayoutDemo extends JFrame {

private JPanel panel1=new JPanel();

private JPanel panel2=new JPanel();

private JPanel panel3=new JPanel();

private JPanel panel4=new JPanel();

public ComplexLayoutDemo()

{

setSize(500, 500);

setLocation(400, 400);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//对panel1进行布局

layoutPanel1();

//对panel2进行布局

layoutPanel2();

//对panel3进行布局

layoutPanel3();

//对panel4进行布局

layoutPanel4();

//对顶层容器进行布局,采用 GridLayout,2行2列

setLayout(new GridLayout(2,2));

add(panel1);

add(panel2);

add(panel3);

add(panel4);

}

private void layoutPanel1() {

JButton north = new JButton("北");

JButton south = new JButton("南");

JButton east = new JButton("东");

JButton west = new JButton("西");

JButton center = new JButton("中");

//panel1采用 BorderLayout 布局

panel1.setLayout(new BorderLayout());

panel1.add(north,BorderLayout.NORTH);

panel1.add(south,BorderLayout.SOUTH);

panel1.add(east,BorderLayout.EAST);

panel1.add(west,BorderLayout.WEST);

panel1.add(center,BorderLayout.CENTER);

}

private void layoutPanel2() {

JButton button1 = new JButton("按键1");

JButton button2 = new JButton("按键2");

JButton button3 = new JButton("按键3");

JButton button4 = new JButton("按键4");

//panel2采用 FlowLayout 布局

panel2.setLayout(new FlowLayout());

panel2.add(button1);

panel2.add(button2);

panel2.add(button3);

panel2.add(button4);

}

private void layoutPanel3() {

JButton button1 = new JButton("按键1");

JButton button2 = new JButton("按键2");

JButton button3 = new JButton("按键3");

JButton button4 = new JButton("按键4");

//panel3采用 GridLayout 布局,2行2列

panel3.setLayout(new GridLayout(2,2));

panel3.add(button1);

panel3.add(button2);

panel3.add(button3);

panel3.add(button4);

}

private void layoutPanel4() {

JButton button=new JButton("按键");

JTextField textField=new JTextField("文本框");

//panel4采用无布局管理器布局

panel4.setLayout(null);

button.setLocation(20, 20);

button.setSize(100, 20);

textField.setBounds(20,50,200,100);

panel4.add(button);

panel4.add(textField);

}

public static void main(String[] args) {

ComplexLayoutDemo frame=new ComplexLayoutDemo();

frame.setVisible(true);

}

}