【发布时间】：2011-02-27 16:02:11
【问题描述】：
当我使用 Netbeans GUI 构建器为我的 Java SE 应用程序构建 GUI 时，它会将所有代码放入私有的 initComponents() 方法中。我无法将其更改为公开。因此，只有包含 UI 的类才能访问所有组件。
我想从另一个类访问这些组件，以便编写自定义事件处理程序和所有内容。最重要的是，我想将我的 GUI 代码和非 GUI 代码分开。
我可以复制粘贴 GUI 代码，然后手动将它们公开以实现我想要的。但那是一种痛苦。每当我需要重新设计 UI 时，我都必须手工制作一部分。
我想做什么：
我使用变量标识符来公开文本框。现在如何从 Main 类访问文本框？我想我也需要在公共方法中生成的组件。
我是 Java 新手。有什么帮助吗？
这是示例类：
用户界面 (uiFrame.java)
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* uiFrame.java
*
* Created on Jun 3, 2010, 9:33:15 PM
*/
package barcode;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import net.sourceforge.barbecue.output.OutputException;
/**
*
* @author masnun
*/
public class uiFrame extends javax.swing.JFrame {
/** Creates new form uiFrame */
public uiFrame() {
try {
try {
// Set cross-platform Java L&F (also called "Metal")
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
Logger.getLogger(uiFrame.class.getName()).log(Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
Logger.getLogger(uiFrame.class.getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(uiFrame.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedLookAndFeelException ex) {
Logger.getLogger(uiFrame.class.getName()).log(Level.SEVERE, null, ex);
}
} finally {
}
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
label1 = new javax.swing.JLabel();
textBox = new javax.swing.JTextField();
saveButton = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
label1.setFont(label1.getFont().deriveFont(label1.getFont().getStyle() | java.awt.Font.BOLD, 13));
label1.setText("Type a text:");
label1.setName("label1"); // NOI18N
saveButton.setText("Save");
saveButton.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent evt) {
saveButtonMousePressed(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()
.addGap(56, 56, 56)
.addComponent(textBox, javax.swing.GroupLayout.PREFERRED_SIZE, 272, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(72, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(154, Short.MAX_VALUE)
.addComponent(saveButton, javax.swing.GroupLayout.PREFERRED_SIZE, 102, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(144, 144, 144))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(140, Short.MAX_VALUE)
.addComponent(label1, javax.swing.GroupLayout.PREFERRED_SIZE, 133, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(127, 127, 127))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(label1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(textBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(saveButton)
.addContainerGap(193, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
@SuppressWarnings("static-access")
private void saveButtonMousePressed(java.awt.event.MouseEvent evt) {
JFileChooser file = new JFileChooser();
file.showSaveDialog(null);
String data = file.getSelectedFile().getAbsolutePath();
String text = textBox.getText();
BarcodeGenerator barcodeFactory = new BarcodeGenerator();
try {
barcodeFactory.generateBarcode(text, data);
} catch (OutputException ex) {
Logger.getLogger(uiFrame.class.getName()).log(Level.SEVERE, null, ex);
}
}
/**
* @param args the command line arguments
*/
// Variables declaration - do not modify
private javax.swing.JLabel label1;
private javax.swing.JButton saveButton;
public javax.swing.JTextField textBox;
// End of variables declaration
}
主类 (Main.java)
package barcode;
import javax.swing.JFrame;
public class Main {
public static void main(String[] args) {
JFrame ui = new uiFrame();
ui.pack();
ui.show();
}
}
【问题讨论】：