import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

//1.继承 JFrame类

//2.在最上方定义组件

//3.在构造方法中创建组件

//4、在构造方法中添加组件

//5.设置窗体属性

//6.显示窗体

//7.在主函数中创建对象

public class flowlayout1 extends JFrame{

   JButton [] a={null,null,null,null,null,null,null,null};

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        flowlayout1 f1=new flowlayout1();

    }

    public flowlayout1 ()

      {

        a[]=new JButton("瓜子");

        a[]=new JButton("话梅");

        a[]=new JButton("西瓜");

        a[]=new JButton("草莓");

        a[]=new JButton("香蕉");

        a[]=new JButton("苹果");

        a[]=new JButton("栗子");

        a[]=new JButton("黄瓜");

        //a[8]=new JButton("葡萄");

        this.setLayout(new FlowLayout(FlowLayout.LEADING));//默认是边界布局，如果想变成其他布局，加上

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.add(a[]);

        this.setTitle("流式布局flowlayout");

        this.setSize(,);

        this.setLocation(, );

        this.setResizable(true);

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        this.setVisible(true);

      }

}