import javax.swing.*;
import java.awt.*;
public class  LayoutFrame extends JFrame {
  public LayoutFrame (){
    super("框架窗口");
    this.setSize(300,200);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      }
  public void SetLayout(){
    //創建新的布局管理器
    FlowLayout Layout=new FlowLayout(FlowLayout.CENTER,8,8);
    //獲取框架窗口的內容面板
    Container container = getContentPane();
    //設置內容面板的布局管理器
    container.setLayout(Layout);
    //創建并向框架添加按鈕
    JButton btnOk =new JButton("確定");
   JButton btnOpen=new JButton("找開");
   JButton btnClose=new JButton("關閉");
   JButton btnHelp=new JButton("幫助");
   container.add(btnOk);
   container.add(btnOpen);
   container.add(btnClose);
   container.add(btnHelp);
  }
  public static void main(String[] args) {
    LayoutFrame  testLayout= new LayoutFrame ( );
    //設置布局
   testLayout.SetLayout();
   //顯示框架窗體
   testLayout.show();
  }
}