我有一个 JFrame，当我单击 JFrame 上的按钮时，它会创建一个具有“Finalize”按钮的新 JInternalFrame。我想要的是，当我单击 Finalize 按钮时，JInternalFrame 会处理并向创建 JInternalFrame 的 JFrame 发送一些值（数据）。
我怎样才能做到这一点？任何相关的例子都会对我有很大帮助。
【问题讨论】：
标签： java swing netbeans jframe jinternalframe
抱歉，我没有太多时间解释。基本上我在下面的代码中所做的就是从 MainFrame 传递给 InternalFrame 的构造函数。这些值是从 InternalFrame 设置的，然后对值进行处理。我刚刚做了一个混乱的 GUI Builder 演示，但您也可以考虑在 MainFrame 中使用 setter 和 setter，并将整个 MainFrame 传递给 InternalFrame。只是一个想法。您可以运行该程序。有时间我会尝试回来，以获得更好的解释。
编辑
所以我懒得做一个真实的例子而不使用看起来超级凌乱的 Gui Builder 代码，所以我将解释重要的部分。您要做的是共享对象。您可以做的是通过构造函数传递我的引用。我在下面所做的是，从MainFrame 传递一个JLabel 和一个String，它们将被InternalFrame 改变。当按下Finalize 按钮时，更改将自动更新到MainFrame。以下是重要代码的样子
MainFrame
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String word = jTextField1.getText();
MyInternalFrame frame = new MyInternalFrame(jLabel1, word);
frame.setVisible(true);
jDesktopPane1.add(frame);
}
InternalFrame
JLabel label;
String word;
public MyInternalFrame(JLabel label, String word) {
this.label = label;
this.word = word;
initComponents();
jTextField1.setText(word);
}
.....
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
label.setText(jTextField1.getText());
this.dispose();
}
这是传递信息的一种简单方式。完整的运行代码。请注意，上面的代码是我在自动生成的代码中更改的all。自动生成的代码主要用于样式和定位，所以不要被它淹没。你只关心上面的代码。
MainFrame.java
public class MainFrame extends javax.swing.JFrame {
public MainFrame() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jDesktopPane1 = new javax.swing.JDesktopPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setText("jTextField1");
jLabel1.setText("The finalized word is :");
jButton1.setText("Show Internal");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout jDesktopPane1Layout = new javax.swing.GroupLayout(jDesktopPane1);
jDesktopPane1.setLayout(jDesktopPane1Layout);
jDesktopPane1Layout.setHorizontalGroup(
jDesktopPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 356, Short.MAX_VALUE)
);
jDesktopPane1Layout.setVerticalGroup(
jDesktopPane1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jDesktopPane1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField1, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 173, Short.MAX_VALUE)
.addComponent(jButton1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jDesktopPane1)
.addGroup(layout.createSequentialGroup()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jButton1)
.addGap(0, 149, Short.MAX_VALUE)))
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String word = jTextField1.getText();
MyInternalFrame frame = new MyInternalFrame(jLabel1, word);
frame.setVisible(true);
jDesktopPane1.add(frame);
}
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(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JDesktopPane jDesktopPane1;
private javax.swing.JLabel jLabel1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
MyInternalFrame.java
import javax.swing.JLabel;
public class MyInternalFrame extends javax.swing.JInternalFrame {
JLabel label;
String word;
public MyInternalFrame(JLabel label, String word) {
this.label = label;
this.word = word;
initComponents();
jTextField1.setText(word);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jTextField1 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jTextField1.setText("jTextField1");
jLabel1.setText("Confirm/Change then FInalize");
jButton1.setText("FInalize");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(51, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 235, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 235, Short.MAX_VALUE)
.addComponent(jTextField1)))
.addGap(49, 49, 49))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(39, 39, 39)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jLabel1)
.addGap(18, 18, 18)
.addComponent(jButton1)
.addContainerGap(43, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
label.setText(jTextField1.getText());
this.dispose();
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
您只需要查看 MyInternalFrame 构造函数和两个类中的 actionPerformed 上的代码
另一个简单的修复就是让InternalFrame成为MainFrame的内部类，这样他们就可以使用与JFrame成员相同的对象
【讨论】：