java的Swing图形界面各种布局

流布局：

package ch10;
import java.awt.FlowLayout;
import javax.swing.*;

public class FlowLayoutDemo extends JFrame{
	private JPanel p;
	private JButton b1,b2,b3;
	public FlowLayoutDemo() {
		super("流布局");
		p=new JPanel();
		FlowLayout layout = new FlowLayout(FlowLayout.LEFT,10,15);
		//设置面板布局
		//使用setLayout方法将布局对象设置到面板中
		p.setLayout(layout);
		b1 = new JButton("Button 1");
		b2 = new JButton("Button 2");
		b3 = new JButton("Button 3");
		p.add(b1);
		p.add(b2);
		p.add(b3);
		this.add(p);
		this.setSize(200,150);
		this.setLocation(100,100);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	public static void main(String[] args) {
		FlowLayoutDemo layout = new FlowLayoutDemo();
		layout.setVisible(true);
	}
}

边界布局：

package ch10;
import java.awt.BorderLayout;
import javax.swing.*;
public class BorderLayoutDemo extends JFrame{
	private JPanel p;
	private JButton b1,b2,b3,b4,b5;
	public BorderLayoutDemo() {
		super("边界布局");
		p = new JPanel();
		//创建一个边界布局管理器对象，并将该布局设置到面板中
		p.setLayout(new BorderLayout());
		b1 = new JButton("Button 东");
		b2 = new JButton("Button 西");
		b3 = new JButton("Button 南");
		b4 = new JButton("Button 北");
		b5 = new JButton("Button 中");
		//添加按钮
		p.add(b1,BorderLayout.EAST);
		p.add(b2,BorderLayout.WEST);
		p.add(b3,BorderLayout.SOUTH);
		p.add(b4,BorderLayout.NORTH);
		p.add(b5,BorderLayout.CENTER);
		this.add(p);
		this.setSize(300,200);
		this.setLocation(100, 100);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args) {
		BorderLayoutDemo f = new BorderLayoutDemo();
		f.setVisible(true);
	}
}

网格布局：

package ch10;
import java.awt.GridLayout;
import javax.swing.*;
public class GridLayoutDemo extends JFrame{
	private JPanel p;
	private JButton b1,b2,b3,b4;
	public GridLayoutDemo() {
		super("网格布局");
		p = new JPanel(new GridLayout(2,2));
		b1 = new JButton("Button 1");
		b2 = new JButton("Button 2");
		b3 = new JButton("Button 3");
		b4 = new JButton("Button 4");
		//将按钮放到面板中
		p.add(b1);
		p.add(b2);
		p.add(b3);
		p.add(b4);
		this.add(p);
		this.setSize(300,200);
		this.setLocation(100,100);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	public static void main(String[] args) {
		GridLayoutDemo f = new GridLayoutDemo();
		f.setVisible(true);
	}
}

卡片布局：

package ch10;
import javax.swing.*;
import java.awt.*;
public class CardLayoutDemo extends JFrame{	
	private JPanel p;
	private JButton b1,b2,b3,b4;
	//声明卡片布局管理器
	private CardLayout c1;
	public CardLayoutDemo() {
		super("卡片布局");
		//实例化卡片布局管理器对象
		c1 = new CardLayout();
		//实例化面板对象
		p = new JPanel(c1);
		b1 = new JButton("我爱看美剧");
		b2 = new JButton("我爱看韩剧");
		b3 = new JButton("我爱看日剧");
		b4 = new JButton("我爱看电影");
		//将组件添加到面板中
		p.add("1",b1);
		p.add("2",b2);
		p.add("3",b3);
		p.add("4",b4);
		this.add(p);
		//c1.last(p);
		c1.show(p, "2");
		this.setSize(200,150);
		this.setLocation(100,100);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args) {
		CardLayoutDemo f = new CardLayoutDemo();
		f.setVisible(true);
	}
}

null布局：

package ch10;
import javax.swing.*;
public class NullDemo extends JFrame{
	private JPanel p;
	private JButton b1,b2;
	public NullDemo() {
		super("空布局");
		p = new JPanel();
		//设置面板布局为空
		p.setLayout(null);
		b1 = new JButton("确定");
		b2 = new JButton("取消");
		//设置按钮大小
		b1.setBounds(50,60,60,25);
		b2.setBounds(160,60,60,25);
		//添加
		p.add(b1);
		p.add(b2);
		this.add(p);
		this.setSize(300,150);
		this.setLocation(100,100);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args) {
		NullDemo f = new NullDemo();
		f.setVisible(true);
	}
}