Question

我正在创建一个跟踪DVD列表的程序。在主页面上，我设置了2个JButtons。当用户单击一个表示新的JFrame时，另一个类的新JFrame会显示输入新DVD信息的字段。我正在尝试在第二帧上创建一个取消按钮，以便当单击取消按钮时，它会重新启动主GUI并关闭新的条目GUI。代码如下，我无法弄清楚如何去做。

主GUI页面

package dvdlibrary;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;


public class bootPage extends javax.swing.JFrame {

    /** Creates new form bootPage */
    public bootPage() {
        initComponents();
    }



    @SuppressWarnings("unchecked")

    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        jLabel1.setText("DVD Library");
        getContentPane().add(jLabel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(168, 11, -1, -1));

        jLabel2.setText("What would you like to do today?");
        getContentPane().add(jLabel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(113, 70, -1, -1));

        jButton1.setText("Create Record");
        jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton1MouseClicked(evt);
            }
        });
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        getContentPane().add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(50, 135, -1, -1));

        jButton2.setText("View Library");
        jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton2MouseClicked(evt);
            }
        });
        getContentPane().add(jButton2, new org.netbeans.lib.awtextra.AbsoluteConstraints(224, 135, 111, -1));

        pack();
    }// </editor-fold>                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         




    }                                        

    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {                                      
      if(evt.getSource()== jButton1)
           dvdlibrary.createEntry.createE();


    }                                     

    private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {                                      
       if(evt.getSource()== jButton2)
           dvdlibrary.movieChooser.movChoo();
    }                                     


    public static void bootP() {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new bootPage().setVisible(true);
                new bootPage().setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;


}

创建条目页

package dvdlibrary;

public class createEntry extends javax.swing.JFrame {


    public createEntry() {
        initComponents();
    }


    @SuppressWarnings("unchecked")

    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jComboBox1 = new javax.swing.JComboBox();
        jTextField2 = new javax.swing.JTextField();
        jTextField3 = new javax.swing.JTextField();
        jTextField4 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setText("Title");

        jLabel2.setText("Genre");

        jLabel3.setText("Length");

        jLabel4.setText("Rating");

        jLabel5.setText("Description");

        jLabel6.setText("Year");

        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        jButton1.setText("Input");

        jButton2.setText("Load");

        jButton3.setText("Save");

        jButton4.setText("Cancel");
        jButton4.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton4MouseClicked(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(19, 19, 19)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel5)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel2)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 174, Short.MAX_VALUE))
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(jLabel3)
                                    .addComponent(jLabel4)
                                    .addComponent(jLabel6))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 32, Short.MAX_VALUE)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(jTextField2)
                                    .addComponent(jTextField4)
                                    .addComponent(jTextField3, javax.swing.GroupLayout.DEFAULT_SIZE, 133, Short.MAX_VALUE)))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(51, 51, 51)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(124, 124, 124)
                        .addComponent(jButton1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(45, 45, 45)
                        .addComponent(jButton4)
                        .addGap(18, 18, 18)
                        .addComponent(jButton2)
                        .addGap(18, 18, 18)
                        .addComponent(jButton3)))
                .addGap(23, 23, 23))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(38, 38, 38)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton1))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel2)
                            .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(26, 26, 26)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel6)
                            .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(29, 29, 29)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel3)
                            .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(37, 37, 37)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jLabel4)
                            .addComponent(jTextField4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(39, 39, 39)
                        .addComponent(jLabel5)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jButton3)
                        .addComponent(jButton2)
                        .addComponent(jButton4)))
                .addContainerGap())
        );

        pack();
    }                       

    private void jButton4MouseClicked(java.awt.event.MouseEvent evt) {                                      


    }                                     


    public static void createE() {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new createEntry().setVisible(true);

            }
        });
    }


    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JTextField jTextField4;
    // End of variables declaration                   

}

Answer 1

我认为你也可以使用DISPOSE_ON_CLOSE：

DISPOSE_ON_CLOSE（默认值为   的JInternalFrame）

当用户关闭窗口时隐藏和处理窗口。这删除   屏幕上的窗口可以释放它使用的任何资源。

Answer 2

您是否阅读过API以找出setDefaultCloseOperation（...）方法的其他值？

您可以使用：

DISPOSE_ON_CLOSE - 框架将关闭。如果这是应用程序的最后一个打开框架，那么JVM也将终止

HIDE_ON_CLOSE - 框架只是设置为不可见。

当用户点击一个说新的时，另一个类的新jframe会出现输入新DVD信息的字段。

程序的真正问题在于您使用框架作为弹出窗口。你应该使用模态JDialog。应用程序应该只有一个带有多个对话框的JFrame来收集其他信息。 JDialog不允许您使用EXIT_ON_CLOSE。

Answer 3

frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE)

Answer 4

我遇到了类似的问题，并使用jFrameInstanceVariable.setVisible(false);作为我按下CANCEL按钮时发生的操作。但每次我点击之后弹出JFrame的按钮时，除了按下按钮创建的新内容之外，所有旧内容仍然存在。

我通过在每次按下弹出JFrame的按钮时创建一个新的JFrame实例来修复此问题。

Answer 5

要隐藏窗口而不实际关闭程序，请执行以下操作：

f.setVisible(false);

Answer 6

如果是这种情况，请确保在初始化时在JFrame上使用setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);，而不是setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;

DISPOSE_ON_CLOSE将在最后一个JFrame时终止您的应用程序关闭了。 EXIT_ON_CLOSE将尽快终止您的申请 JFrame已关闭。 HIDE_ON_CLOSE（默认值）不会终止您的应用程序，即使隐藏了所有JFrame。

Answer 7

如果您只是隐藏程序，使用HIDE_ON_CLOSE或set.Visible(false)，这不是一个很好的选择，因为如果您使用更多帧执行更大的操作，隐藏的帧仍将运行，从而减慢速度降低电脑性能。正如其他人所说的，这种方式不是使用setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);，而是在点击＆＃34; X，关闭所有帧时终止程序，使用以下内容：

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

Answer 8

如果您使用的按钮就像我认为您说的那样

this.dispose();

会做的伎俩..

Answer 9

尝试将this.dispose();置于取消按钮方法中。

如何在不关闭主程序的情况下关闭jframe

9 个答案: