3种布局管理器

一、流式布局

package com.massimo.charpter12;

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();

        //组件-按钮
        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        //设置为流式布局
        frame.setLayout(new FlowLayout());  //默认中间开始
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT)); //左边开始
        //frame.setLayout(new FlowLayout(FlowLayout.RIGHT)); //右边开始

        frame.setSize(200 , 200);

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);

        frame.addWindowListener(new WindowAdapter() { 
   
            @Override
            public void windowClosing(WindowEvent e) { 
   
                System.exit(0);
            }
        });
    }
}

效果：

二、东西南北中

package com.massimo.charpter12;

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("West");
        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() { 
   
            @Override
            public void windowClosing(WindowEvent e) { 
   
                System.exit(0);
            }
        });
    }
}

效果：

三、表格布局 Grid

package com.massimo.charpter12;

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");

        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");

        frame.setLayout(new GridLayout(3 , 2));

        frame.add(btn1);
        frame.add(btn2);
        frame.add(btn3);
        frame.add(btn4);
        frame.add(btn5);
        frame.add(btn6);

        frame.pack(); //Java函数！自动帮你设置最优的窗口大小
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() { 
   
            @Override
            public void windowClosing(WindowEvent e) { 
   
                System.exit(0);
            }
        });
    }
}

效果：

四、综合布局

试设计如下布局：

代码1：

package com.massimo.charpter12;

import javax.swing.border.Border;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.nio.ByteOrder;

public class TestLayout { 
   
    public static void main(String[] args) { 
   
        Frame frame = new Frame("TestLayout");

        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");

        frame.setLayout(new GridLayout(2 , 3));

        Panel panel1 = new Panel();
        panel1.setBounds(50 , 50 , 400 , 400);
        panel1.setBackground(new Color(190 , 15 , 60));
        panel1.setLayout(new GridLayout(1 , 1));
        panel1.add(btn1);

        Panel panel2 = new Panel();
        panel2.setBounds(50 , 50 , 400 , 400);
        panel2.setBackground(new Color(183, 190, 130));
        panel2.setLayout(new GridLayout(2 , 1));
        panel2.add(btn2);
        panel2.add(btn3);

        Panel panel3 = new Panel();
        panel3.setBounds(50 , 50 , 400 , 400);
        panel3.setBackground(new Color(72, 186, 190));
        panel3.setLayout(new GridLayout(1 , 1));
        panel3.add(btn4);

        Panel panel4 = new Panel();
        panel4.setBounds(50 , 50 , 400 , 400);
        panel4.setBackground(new Color(114, 48, 190));
        panel4.setLayout(new GridLayout(1 , 1));
        panel4.add(btn5);

        Panel panel5 = new Panel();
        panel5.setBounds(50 , 50 , 400 , 400);
        panel5.setBackground(new Color(186, 17, 190));
        panel5.setLayout(new GridLayout(2 , 2));
        panel5.add(btn6);
        panel5.add(btn7);
        panel5.add(btn8);
        panel5.add(btn9);

        Panel panel6 = new Panel();
        panel6.setBounds(50 , 50 , 400 , 400);
        panel6.setBackground(new Color(190 , 15 , 60));
        panel6.setLayout(new GridLayout(1 , 1));
        panel6.add(btn10);


        frame.add(panel1);
        frame.add(panel2);
        frame.add(panel3);
        frame.add(panel4);
        frame.add(panel5);
        frame.add(panel6);


        frame.pack();
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() { 
   
            @Override
            public void windowClosing(WindowEvent e) { 
   
                System.exit(0);
            }
        });

    }
}

效果：

代码2：

package com.massimo.charpter12;

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

public class TestLayout2 { 
   
    public static void main(String[] args) { 
   
        //总 Frame
        Frame frame = new Frame();
        frame.setSize(400 , 300);
        frame.setLocation(300 , 400);
        frame.setBackground(Color.black);
        frame.setVisible(true);
        frame.setLayout(new GridLayout(2 , 1));

        //4个面板
        Panel p1 = new Panel(new BorderLayout());
        Panel p2 = new Panel(new GridLayout(2 , 1));
        Panel p3 = new Panel(new BorderLayout());
        Panel p4 = new Panel(new GridLayout(2 , 2));

        //上
        p1.add(new Button("East-1") , BorderLayout.EAST);
        p1.add(new Button("West-1") , BorderLayout.WEST);
        p2.add(new Button("p2-btn-1"));
        p2.add(new Button("p2-btn-2"));
        p1.add(p2 , BorderLayout.CENTER);

        //下
        p3.add(new Button("East-2") , BorderLayout.EAST);
        p3.add(new Button("West-2") , BorderLayout.WEST);
        p4.add(new Button("p4-btn-1"));
        p4.add(new Button("p4-btn-2"));
        p4.add(new Button("p4-btn-3"));
        p4.add(new Button("p4-btn-4"));
        p3.add(p4 , BorderLayout.CENTER);

        frame.add(p1);
        frame.add(p3);

        frame.addWindowListener(new WindowAdapter() { 
   
            @Override
            public void windowClosing(WindowEvent e) { 
   
                System.exit(0);
            }
        });


    }
}

效果：

代码n…

五、总结

1.Frame是一个顶级窗口；
2.Panel无法单独显示，必须添加到某个容器中；

3.布局管理器：
1.流式
2.东西南北中
3.表格

4.大小，定位，背景颜色，可见性!

今天的文章3种布局管理器分享到此就结束了，感谢您的阅读。