javaUI之三种布局管理

边界布局：唯一一个不用用this.setLayout();的，默认网格布局

package com.SwingIn51;
import java.awt.*;
import javax.swing.*;
public class BorderLayoutDemo extends JFrame {
	JButton an1,an2,an3,an4,an5;
	public BorderLayoutDemo() {
		an1=new JButton("东方");
		an2=new JButton("西方");
		an3=new JButton("南方");
		an4=new JButton("北方");
		an5=new JButton("中部");
		this.add(an1,BorderLayout.EAST);//设置添加的位置
		this.add(an2,BorderLayout.WEST);
		this.add(an3,BorderLayout.NORTH);
		this.add(an4,BorderLayout.SOUTH);
		this.add(an5,BorderLayout.CENTER);//中间可以不写，直接this.add(an5);
		this.setTitle("边界布局BorderLayout");
		this.setSize(380, 320);
		this.setLocation(200, 200);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.setResizable(false);
		
	}
	public static void main(String[] args) {
		BorderLayoutDemo b=new BorderLayoutDemo();
	}

}

流式布局：

package com.SwingIn51;
import java.awt.*;
import javax.swing.*;
public class FlowLayoutDemo extends JFrame{
	JButton[] an= {null,null,null,null,null,null};
	public static void main(String[] args) {
		FlowLayoutDemo z=new FlowLayoutDemo();
	}
	public FlowLayoutDemo() {
		an[0]=new JButton("话梅");
		an[1]=new JButton("果脯");
		an[2]=new JButton("薯片");
		an[3]=new JButton("饼干");
		an[4]=new JButton("巧克力");
		an[5]=new JButton("开心果");
		this.setLayout(new FlowLayout());
		this.add(an[0]);
		this.add(an[1]);
		this.add(an[2]);
		this.add(an[3]);
		this.add(an[4]);
		this.add(an[5]);
		this.setTitle("FlowLaout");
		this.setSize(380,320);
		this.setLocation(200,200);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setResizable(false);
		this.setVisible(true);
	}

}

网格布局：

package com.SwingIn51;
import java.awt.*;
import javax.swing.*;

public class GirdLayout extends JFrame {
	JButton an[]= {null,null,null,null};
	int s=4;
	public GirdLayout() {
		an[0]=new JButton("话梅");
		an[1]=new JButton("福");
		an[2]=new JButton("敲了李");
		an[3]=new JButton("饼干");
		//this.setLayout(new GridLayout(3,3));
		this.setLayout(new GridLayout(3,3,12,13));
		for(int i=0;i<s;i++) {
			this.add(an[i]);
		}
		this.setTitle("网格布局");
		this.setSize(380,320);
		this.setLocation(200, 200);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
	}
	public static void main(String[] args) {
		GirdLayout a=new GirdLayout();
	}

}

三种布局的步骤：

1。继承JFame

2.定义组件

3，创建组件

4.添加组件

5一些属性的添加

6以上2到5均在构造方法中完成