Java中三种常用布局方式小结

import javax.swing.*;
import java.awt.*;
 
public class FlowLayoutExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("FlowLayout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
 
        // 设置布局管理器为FlowLayout
        frame.setLayout(new FlowLayout());
 
        // 添加组件
        frame.add(new JButton("Button 1"));
        frame.add(new JButton("Button 2"));
        frame.add(new JButton("Button 3"));
 
        // 显示窗口
        frame.setVisible(true);
    }
}

import javax.swing.*;
import java.awt.*;
 
public class BorderLayoutExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("BorderLayout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
 
        // 设置布局管理器为BorderLayout
        frame.setLayout(new BorderLayout());
 
        // 添加组件
        frame.add(new JButton("North"), BorderLayout.NORTH);
        frame.add(new JButton("South"), BorderLayout.SOUTH);
        frame.add(new JButton("East"), BorderLayout.EAST);
        frame.add(new JButton("West"), BorderLayout.WEST);
        frame.add(new JButton("Center"), BorderLayout.CENTER);
 
        // 显示窗口
        frame.setVisible(true);
    }
}

import javax.swing.*;
import java.awt.*;
 
public class GridLayoutExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("GridLayout Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
 
        // 设置布局管理器为GridLayout，3行3列
        frame.setLayout(new GridLayout(3, 3));
 
        // 添加组件
        for (int i = 1; i <= 9; i++) {
            frame.add(new JButton("Button " + i));
        }
 
        // 显示窗口
        frame.setVisible(true);
    }
}