如何使用mouseClicked在循环内获取JLabel的值？

Question

我对我的简单程序进行了修改，而不是使用表格我创建了自定义代码以使用JPanel显示我的列表。我现在的问题是，当我点击按钮时，它给了我最后一个列表的值。

这是我的方法看起来像：

private void customize(List<Student> students) {
    panelStudentHolder.removeAll();
    panelStudentHolder.revalidate();
    panelStudentHolder.repaint();
    for (Student student : students) {
        panelStudentHolder.setLayout(new java.awt.GridLayout(0, 1, 0, 0));
        panelStudentHolder.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Student List", javax.swing.border.TitledBorder.CENTER, javax.swing.border.TitledBorder.ABOVE_TOP, new java.awt.Font("Century Gothic", 1, 14))); // NOI18N
        panelStudent = new javax.swing.JPanel();
        lblStudent = new javax.swing.JLabel();

        btnBackUp = new javax.swing.JLabel();
        btnEdit = new javax.swing.JLabel();
        btnBlock = new javax.swing.JLabel();

        lblStudent.setFont(new java.awt.Font("Century Gothic", 0, 14)); // NOI18N
        lblStudent.setText(student.toString()+" >> "+student.getId());

        btnEdit.setIcon(new javax.swing.ImageIcon(getClass().getResource("/icons/icons8-view-20.png"))); // NOI18N
        btnEdit.setText("Edit");
        btnEdit.addMouseListener(new java.awt.event.MouseAdapter() {
            @Override
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                System.out.println(" "+lblStudent.getText());
            }
        });


        javax.swing.GroupLayout panelStudentLayout = new javax.swing.GroupLayout(panelStudent);
        panelStudent.setLayout(panelStudentLayout);
        panelStudentLayout.setHorizontalGroup(
        panelStudentLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, panelStudentLayout.createSequentialGroup()
            .addComponent(lblStudent, javax.swing.GroupLayout.DEFAULT_SIZE, 740, Short.MAX_VALUE)
            .addGap(18, 18, 18)
            .addComponent(btnBackUp)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(btnEdit)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(btnBlock)
            .addGap(2, 2, 2))
        );
        panelStudentLayout.setVerticalGroup(
            panelStudentLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(lblStudent, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(btnBackUp, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(btnEdit, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(btnBlock, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );


        panelStudentHolder.add(panelStudent);

    }
}

这是我的问题出现的地方：

btnView.addMouseListener(new java.awt.event.MouseAdapter() {
            @Override
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                System.out.println(" "+lblStudent.getText());

//这里总是给我列表的最后一个值。 }};

Answer 1

对于第二部分，您可以设置面板的背景颜色，

并且为了进行收缩，给面板提供minsize，maxsize和首选尺寸，以解决第二个问题

你也可以使用我帮助的盒子布局。