JavaGui布局

常见布局

BorderLayout(边界布局)

BorderLayout.EAST

BorderLayout.WAST

BorderLayout.NORTH

BorderLayout.SNUTH

FlowLayout(流式布局)

FlowLayout.LEFT

FlowLayout.CENTER

FlowLayout.RIGHT

GridLayout(表格布局)

GridLayout(行，列)

BoxLayout(盒子布局)

null(空)

布局嵌套实例

package Day08;

import java.awt.*;

public class Demo02 {

public static void main(String[] args) {

Frame frame=new Frame();

//frame.setBounds(100, 100, 500, 300);

frame.pack();

//pack函数，自适应大小

frame.setVisible(true);

Button btn1=new Button("btn1");

Button btn2=new Button("btn2");

Button btn3=new Button("btn3");

Button btn4=new Button("btn4");

Button btn5=new Button("btn5");

Button btn6=new Button("btn6");

Button btn7=new Button("btn7");

Button btn8=new Button("btn8");

Button btn9=new Button("btn9");

Button btn10=new Button("btn10");

Panel panel1=new Panel();

Panel panel2=new Panel();

Panel panel3=new Panel();

Panel panel4=new Panel();

Panel panel5=new Panel();

//左面板

panel1.setLayout(new GridLayout(2,1));

panel1.add(btn10);

panel1.add(btn9);

//中上面板

panel2.setLayout(new GridLayout(2,1));

panel2.add(btn8);

panel2.add(btn7);

//中下面板

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

panel3.add(btn6);

panel3.add(btn5);

panel3.add(btn4);

panel3.add(btn3);

//中面板，由panel2以及panel3构成

panel4.setLayout(new GridLayout(2,1));

panel4.add(panel2);

panel4.add(panel3);

//右面板

panel5.setLayout(new GridLayout(2,1));

panel5.add(btn2);

panel5.add(btn1);

//窗口采用表单布局，缺陷是未实现左右中面板大小不同

frame.setLayout(new GridLayout());

frame.add(panel5);

frame.add(panel4);

frame.add(panel1);

}

}

运行效果如图：

package Day08;

import java.awt.*;

public class Demo03 {

public static void main(String[] args) {

Frame frame=new Frame();

frame.pack();

frame.setVisible(true);

frame.setLayout(new GridLayout(2,1));

Panel up=new Panel(new BorderLayout());

Panel down=new Panel(new BorderLayout());

Panel upCenter=new Panel(new GridLayout(2,1));

Panel downCenter=new Panel(new GridLayout(2,2));

up.add(new Button("Eest----1"),BorderLayout.EAST);

up.add(new Button("West----1"),BorderLayout.WEST);

down.add(new Button("Eest----2"),BorderLayout.EAST);

down.add(new Button("West----2"),BorderLayout.WEST);

upCenter.add(new Button());

upCenter.add(new Button());

downCenter.add(new Button());

downCenter.add(new Button());

downCenter.add(new Button());

downCenter.add(new Button());

up.add(upCenter,BorderLayout.CENTER);

down.add(downCenter,BorderLayout.CENTER);

frame.add(up);

frame.add(down);

}

}

运行效果如图：