java - 分层 Pane 一次后就不起作用

Question

这是我的图形表示的代码，但问题是 lpane 调用一次，但当我再次按下开始时，它不会调用赌场的构造函数，但我检查过控制台程序也可以工作，但 lpane 不会更改卡片... ......

package test;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class Test extends javax.swing.JFrame {


    public Test() {
        initComponents();
         start.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e){

                new Casino();
                new JLayeredPane();
                System.out.println(Casino.p[0].getpHand()[0].getValue());
            }
        });
    }
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        start = new javax.swing.JButton();
        lpane = new javax.swing.JLayeredPane();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        start.setText("Start");

        javax.swing.GroupLayout jLayeredPane1Layout = new javax.swing.GroupLayout(lpane);
        lpane.setLayout(jLayeredPane1Layout);
        jLayeredPane1Layout.setHorizontalGroup(
            jLayeredPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 691, Short.MAX_VALUE)
        );
        jLayeredPane1Layout.setVerticalGroup(
            jLayeredPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 475, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(start)
                .addContainerGap())
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(lpane, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(114, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(lpane)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(start)
                .addContainerGap())
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(19, 19, 19)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(36, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }


    public static void main(String args[]) {


        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }


        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Test().setVisible(true);
            }
        });
    }

    public static JLayeredPane getLPane(){
    return lpane;
}


    private static javax.swing.JLayeredPane lpane;
    private static javax.swing.JPanel jPanel1;
    private static javax.swing.JButton start;

}

Answer 1

退后一步，看看您的 mouseClicked 事件...

           public void mouseClicked(MouseEvent e){

                new Casino();
                new JLayeredPane();
                System.out.println(Casino.p[0].getpHand()[0].getValue());
            }

您创建 Casino 和 JLayeredPane 的新实例并使用它进行操作，它们甚至没有分配给某种引用...

不要依赖静态引用，它们是糟糕设计的明显标志......

不要在按钮上使用 MouseListener，您应该使用 ActionListener

远离表单设计器，说真的，它对你有害。花时间阅读 Creating a GUI With JFC/Swing ，了解如何手工构建 UI 以及生成复杂界面所需的技巧，只有这样您才会了解表单设计器可以为您做什么以及如何使用它。