fsdfsdf

import java.awt.BorderLayout;import java.awt.FlowLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class Demo1 extends JFrame {private JButton[] a = new JButton[6];private String[] s = {"小二","小三","小中","下一","下二","下三"};private static JPanel uPanel = new JPanel();private static JPanel cPanel = new JPanel();private static JPanel dPanel = new JPanel();public Demo1(){uPanel.setLayout(new FlowLayout());dPanel.setLayout(new FlowLayout());btnInit();cPanel.add(a[2]);getContentPane().add(uPanel,BorderLayout.NORTH);getContentPane().add(dPanel,BorderLayout.SOUTH);getContentPane().add(cPanel,BorderLayout.CENTER);pack();}public void btnInit(){for(int i = 0;i<a.length;i++){a[i] = new JButton(s[i]);if(i<=1){uPanel.add(a[i]);}if(i>=3){dPanel.add(a[i]);}}}public static void main(String[] args) {new Demo1().setVisible(true);}}