JApplet打开新窗口，当点击jButton3

Question

这是我的小程序到目前为止，我无法弄清楚如何打开一个新的窗口（JFrame），当我点击“注册”JButton，我想打开一个新窗口“注册表单窗口”是注册所有用户（用户名，用户密码，年龄等）。

LogIn.java

package intranetmailingsystem; 

import java.lang.reflect.InvocationTargetException; 
import javax.swing.JFrame; 

public class LogIn extends javax.swing.JApplet{ 

    @Override 
    public void init() { 
     try { 
      java.awt.EventQueue.invokeAndWait(this::initComponents); 
     } catch (InterruptedException | InvocationTargetException ex) { 
     } 
    } 

    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jLabel1 = new javax.swing.JLabel(); 
     jLabel2 = new javax.swing.JLabel(); 
     jLabel3 = new javax.swing.JLabel(); 
     jTextField1 = new javax.swing.JTextField(); 
     jTextField2 = new javax.swing.JTextField(); 
     jButton1 = new javax.swing.JButton(); 
     jButton2 = new javax.swing.JButton(); 
     jButton3 = new javax.swing.JButton(); 

     jLabel1.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N 
     jLabel1.setText("Intranet Mailing System"); 

     jLabel2.setText("User name"); 

     jLabel3.setText("Password"); 

     jTextField2.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jTextField2ActionPerformed(evt); 
      } 
     }); 

     jButton1.setText("LogIn"); 

     jButton2.setText("Clear"); 
     jButton2.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jButton2ActionPerformed(evt); 
      } 
     }); 

     jButton3.setText("Register"); 
     jButton3.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jButton3ActionPerformed(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(35, 35, 35) 
         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
          .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, 75, Short.MAX_VALUE) 
          .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
         .addGap(36, 36, 36) 
         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) 
          .addComponent(jTextField1) 
          .addComponent(jTextField2, javax.swing.GroupLayout.DEFAULT_SIZE, 128, Short.MAX_VALUE))) 
        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) 
         .addGroup(layout.createSequentialGroup() 
          .addGap(53, 53, 53) 
          .addComponent(jButton1) 
          .addGap(48, 48, 48) 
          .addComponent(jButton2) 
          .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) 
          .addComponent(jButton3)) 
         .addGroup(layout.createSequentialGroup() 
          .addGap(68, 68, 68) 
          .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 283, javax.swing.GroupLayout.PREFERRED_SIZE)))) 
       .addContainerGap(49, Short.MAX_VALUE)) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGroup(layout.createSequentialGroup() 
       .addGap(22, 22, 22) 
       .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE) 
       .addGap(38, 38, 38) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel2) 
        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addGap(18, 18, 18) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jLabel3) 
        .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) 
       .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 64, Short.MAX_VALUE) 
       .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) 
        .addComponent(jButton1) 
        .addComponent(jButton2) 
        .addComponent(jButton3)) 
       .addGap(65, 65, 65)) 
     ); 
    }// </editor-fold>       

    private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) {            
     // TODO add your handling code here: 
    }           

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
     // need to add some code here ! 

    }           

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {           
     { 
      jTextField1.setText(""); 
      jTextField2.setText(""); 
     } 
    }           


    // Variables declaration - do not modify      
    private javax.swing.JButton jButton1; 
    private javax.swing.JButton jButton2; 
    private javax.swing.JButton jButton3; 
    private javax.swing.JLabel jLabel1; 
    private javax.swing.JLabel jLabel2; 
    private javax.swing.JLabel jLabel3; 
    private javax.swing.JTextField jTextField1; 
    private javax.swing.JTextField jTextField2; 
    // End of variables declaration     

    private void dispose() { 
     throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. 
    } 
} 

InternetMailingSystem.java：

package intranetmailingsystem; 

    public class IntranetMailingSystem 
    { 
     public static void main(String[] args) 
     { 
      // TODO code application logic here 
     } 
    } 

请检查： Image

Answer 1

你必须创建另一个窗口。因此，如果您创建另一个JFrame类调用注册，您可以将其添加到代码中。

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
     Register menu = new Register(); 
     menu.setVisible(true); 



    }