GUI编程02-布局管理器

流式布局 FlowLayout

东西南北中 BorderLayout

表格布局 GridLayout

流式布局

package YMP.GUI;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestFlowLayout {public static void main(String[] args) {Frame frame=new Frame("TestFlowLayout");
Button button1=new Button("btn1");Button button2=new Button("btn2");Button button3=new Button("btn3");
frame.setLayout(new FlowLayout());frame.setSize(200,200);frame.setVisible(true);
frame.add(button1);frame.add(button2);frame.add(button3);
frame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});
}
}

东西南北中

package YMP.GUI;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestBorderLayout {public static void main(String[] args) {Frame frame=new Frame("TestBorderLayout");Button east=new Button("East");Button west=new Button("Wset");Button south=new Button("South");Button north=new Button("North");Button center=new Button("Center");
frame.add(east,BorderLayout.EAST);frame.add(west,BorderLayout.WEST);frame.add(south,BorderLayout.SOUTH);frame.add(north,BorderLayout.NORTH);frame.add(center,BorderLayout.CENTER);
frame.setSize(200,200);frame.setVisible(true);frame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}
}

表格布局

package YMP.GUI;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestGridLayout {public static void main(String[] args) {Frame frame=new Frame("TestGridLayout");
frame.setLayout(new GridLayout(3,2));
for(int i=0;i<6;i++){frame.add(new Button("bton"+(i+1)));}
frame.setSize(400,400);frame.setVisible(true);frame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}
}

应用练习

设计出图片所示窗口

流程思路

1.frame顶级容器

2.4个panel，分别对应frame的上半，下半和图中橙黄两色块

3.蓝色部分为button

4.在橙黄色色块中用BorderLayout加入button

代码实现

package YMP.GUI;

import javax.swing.border.Border;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;

public class ExDemo {public static void main(String[] args) {Frame frame=new Frame();frame.setSize(400,300);frame.setLayout(new GridLayout(2,1));frame.setVisible(true);

Panel p1=new Panel();Panel p2=new Panel();Panel p3=new Panel();Panel p4=new Panel();
frame.add(p1);frame.add(p2);


Button button1=new Button("btn1");Button button2=new Button("btn2");Button button3=new Button("btn3");Button button4=new Button("btn4");Button button5=new Button("btn5");Button button6=new Button("btn6");Button button7=new Button("btn7");Button button8=new Button("btn8");Button button9=new Button("btn9");Button button10=new Button("btn10");
p1.setLayout(new BorderLayout());p1.add(button2,BorderLayout.EAST);p1.add(button1,BorderLayout.WEST);p1.add(p3,BorderLayout.CENTER);
p2.setLayout(new BorderLayout());p2.add(button3,BorderLayout.WEST);p2.add(button4,BorderLayout.EAST);p2.add(p4, BorderLayout.CENTER);
p3.setLayout(new GridLayout(2,1));p3.add(button5);p3.add(button6);
p4.setLayout(new GridLayout(2,2));p4.add(button7);p4.add(button8);p4.add(button9);p4.add(button10);
frame.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});}
}