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我有兩個jFrame main.java和NewMasterDetailForm.java。使用下面的代碼我試圖打開NewMasterDetailForm.java，但它是不開放 -NewMasterDetailForm無法使用setVisible（true）
NewMasterDetailForm call= new NewMasterDetailForm();
call.setVisible(true);
我還試過
new NewMasterDetailForm().setVisible(true)
我已經把上面的代碼放到一個按鈕和完整代碼是使用IDE NetBeans中內置的功能，它已經產生自己整個腳本如下
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
NewMasterDetailForm call= new NewMasterDetailForm();
call.setVisible(true);
}
我創建NewMasterDetailForm.java。它主要由與MySQL的連接信息組成，並從中獲取細節。 NewMasterDetailForm.java包含下面的代碼
package yc;
import java.awt.EventQueue;
import java.beans.Beans;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
*
* @author Raam
*/
public class NewMasterDetailForm extends JPanel {
public NewMasterDetailForm() {
initComponents();
if (!Beans.isDesignTime()) {
entityManager.getTransaction().begin();
this.setOpaque(true);
}
}
/**
* 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() {
bindingGroup = new org.jdesktop.beansbinding.BindingGroup();
entityManager = java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory("yello_cab?zeroDateTimeBehavior=convertToNullPU").createEntityManager();
query = java.beans.Beans.isDesignTime() ? null : entityManager.createQuery("SELECT y FROM YcTable y");
list = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : org.jdesktop.observablecollections.ObservableCollections.observableList(query.getResultList());
masterScrollPane = new javax.swing.JScrollPane();
masterTable = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
FormListener formListener = new FormListener();
org.jdesktop.swingbinding.JTableBinding jTableBinding = org.jdesktop.swingbinding.SwingBindings.createJTableBinding(org.jdesktop.beansbinding.AutoBinding.UpdateStrategy.READ_WRITE, list, masterTable);
org.jdesktop.swingbinding.JTableBinding.ColumnBinding columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${bookId}"));
columnBinding.setColumnName("Book Id");
columnBinding.setColumnClass(Integer.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${cuName}"));
columnBinding.setColumnName("Cu Name");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${mobile}"));
columnBinding.setColumnName("Mobile");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${noPersons}"));
columnBinding.setColumnName("No Persons");
columnBinding.setColumnClass(Integer.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${email}"));
columnBinding.setColumnName("Email");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${gender}"));
columnBinding.setColumnName("Gender");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${cabType}"));
columnBinding.setColumnName("Cab Type");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${PPoint}"));
columnBinding.setColumnName("PPoint");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${DPoint}"));
columnBinding.setColumnName("DPoint");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${PTime}"));
columnBinding.setColumnName("PTime");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${PDate}"));
columnBinding.setColumnName("PDate");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${riderType}"));
columnBinding.setColumnName("Rider Type");
columnBinding.setColumnClass(String.class);
columnBinding = jTableBinding.addColumnBinding(org.jdesktop.beansbinding.ELProperty.create("${paymentMode}"));
columnBinding.setColumnName("Payment Mode");
columnBinding.setColumnClass(String.class);
bindingGroup.addBinding(jTableBinding);
masterScrollPane.setViewportView(masterTable);
jButton1.setText("Close");
jButton1.addActionListener(formListener);
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/yc/yc.png"))); // NOI18N
jLabel2.setFont(new java.awt.Font("Tahoma", 2, 18)); // NOI18N
jLabel2.setText("Contact 24x7 ");
jLabel3.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
jLabel3.setText("1800-1100-MEGHA");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(masterScrollPane, javax.swing.GroupLayout.DEFAULT_SIZE, 804, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2, javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel3, javax.swing.GroupLayout.Alignment.TRAILING)))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jButton1)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel3)))
.addComponent(masterScrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton1)
.addContainerGap())
);
bindingGroup.bind();
}
// Code for dispatching events from components to event handlers.
private class FormListener implements java.awt.event.ActionListener {
FormListener() {}
public void actionPerformed(java.awt.event.ActionEvent evt) {
if (evt.getSource() == jButton1) {
NewMasterDetailForm.this.jButton1ActionPerformed(evt);
}
}
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
new main().setVisible(true);
this.setVisible(false);
}
// Variables declaration - do not modify
private javax.persistence.EntityManager entityManager;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private java.util.List<yc.YcTable> list;
private javax.swing.JScrollPane masterScrollPane;
private javax.swing.JTable masterTable;
private javax.persistence.Query query;
private org.jdesktop.beansbinding.BindingGroup bindingGroup;
// End of variables declaration
public static void main(String[] args) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
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(NewMasterDetailForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewMasterDetailForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewMasterDetailForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewMasterDetailForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
frame.setContentPane(new NewMasterDetailForm());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
});
}
}
考慮提供一個[runnable示例]（https://stackoverflow.com/help/mcve），它演示了您的問題。這不是代碼轉儲，而是您正在做的事情的一個例子，它突出了您遇到的問題。這會減少混淆和更好的反應 – MadProgrammer
我很抱歉，但您應該尊重StackOver上的其他人。事實上，我相信你從來沒有使用過NewMasterDetailForm和jFrame。 –
我從來沒有使用過'NewMasterDetailForm'，因爲你從來沒有向我們展示過'JFrame'，現在，我已經使用了16年以上，自Java 1.3以來，但當然，尊重，如果你不想要我們的幫助，當然，完全是你的選擇 – MadProgrammer