如何將JTextField組件保存在.txt文件中？（使用Netbeans GUI）

這就是我現在所做的，我想做一個java項目，但我真的很想看到一些例子來理解我可以做到這一點的方式。如果我想要全部JTextField的成分，並將其保存到一個文件如何將JTextField組件保存在.txt文件中？（使用Netbeans GUI）

public class Lift extends javax.swing.JFrame { 

     public Lift() 
     { 
      super("Lift Maintenance"); 
      initComponents(); 
     } 


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

      jLabel1 = new javax.swing.JLabel(); 
      jTextField1 = new javax.swing.JTextField(); 
      jLabel2 = new javax.swing.JLabel(); 
      jTextField2 = new javax.swing.JTextField(); 
      jLabel3 = new javax.swing.JLabel(); 
      jTextField3 = new javax.swing.JTextField(); 
      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("Lift maintenance:"); 

      jLabel2.setText("Lift parts:"); 

      jLabel3.setText("Technician:"); 

      jButton1.setText("NEXT"); 
      jButton1.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton1ActionPerformed(evt); 
       } 
      }); 

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

      jButton3.setText("CLEAR"); 
      jButton3.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton3ActionPerformed(evt); 
       } 
      }); 

      jButton4.setText("EXIT"); 
      jButton4.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton4ActionPerformed(evt); 
       } 
      }); 

      org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane()); 
      getContentPane().setLayout(layout); 
      layout.setHorizontalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
         .add(jLabel1) 
         .add(jLabel3) 
         .add(jLabel2)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false) 
         .add(jTextField2) 
         .add(jTextField3) 
         .add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 83, Short.MAX_VALUE))) 
       .add(layout.createSequentialGroup() 
        .add(jButton3) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(jButton4) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(jButton2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 92, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED) 
        .add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 101, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
      ); 
      layout.setVerticalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel1) 
         .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .add(20, 20, 20) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel2) 
         .add(jTextField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 32, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .add(18, 18, 18) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel3) 
         .add(jTextField3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 146, Short.MAX_VALUE) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jButton3) 
         .add(jButton4) 
         .add(jButton2) 
         .add(jButton1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 29, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))) 
      ); 

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

     private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
      jTextField1.setText(""); 
      jTextField2.setText(""); 
      jTextField3.setText(""); 
     }           

     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
      this.dispose(); 
      coOwnerShip C=new coOwnerShip(); 
      C.setVisible(true); 
     }           

     private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {           
      this.dispose(); 
      HeatingCost h=new HeatingCost(); 
      h.setVisible(true); 
     }           

     private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {           
      System.exit(0); 
     }           


     public static void main(String args[]) { 
      java.awt.EventQueue.invokeLater(new Runnable() { 
       public void run() { 
        new Lift().setVisible(true); 
       } 
      }); 
     } 

     // Variables declaration - do not modify      
     private javax.swing.JButton jButton1; 
     private javax.swing.JButton jButton2; 
     private javax.swing.JButton jButton3; 
     private javax.swing.JButton jButton4; 
     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; 
     private javax.swing.JTextField jTextField3; 
     // End of variables declaration     

    }

再次另一類....

public class coOwnerShip extends javax.swing.JFrame { 

     /** Creates new form coOwnerShip */ 
     public coOwnerShip() 
     { 
      super("Co=Ownership Cost"); 
      initComponents(); 
     } 


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

      jLabel1 = new javax.swing.JLabel(); 
      jTextField1 = new javax.swing.JTextField(); 
      jLabel2 = new javax.swing.JLabel(); 
      jTextField2 = new javax.swing.JTextField(); 
      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("Taxis:"); 

      jLabel2.setText("Co-Ownership cost:"); 

      jButton1.setText("NEXT"); 
      jButton1.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton1ActionPerformed(evt); 
       } 
      }); 

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

      jButton3.setText("CLEAR"); 
      jButton3.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton3ActionPerformed(evt); 
       } 
      }); 

      jButton4.setText("EXIT"); 
      jButton4.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton4ActionPerformed(evt); 
       } 
      }); 

      org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane()); 
      getContentPane().setLayout(layout); 
      layout.setHorizontalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
         .add(jLabel2) 
         .add(jLabel1) 
         .add(layout.createSequentialGroup() 
          .add(jButton3) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
          .add(jButton4))) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(jButton2) 
        .add(9, 9, 9) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
         .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false) 
          .add(jTextField2) 
          .add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 82, Short.MAX_VALUE)) 
         .add(jButton1)) 
        .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) 
      ); 
      layout.setVerticalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(40, 40, 40) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel1) 
         .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel2) 
         .add(jTextField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 199, Short.MAX_VALUE) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jButton3) 
         .add(jButton4) 
         .add(jButton2) 
         .add(jButton1))) 
      ); 

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

     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
      this.dispose(); 
      BuildingCostOutputStream b=new BuildingCostOutputStream(); 
      b.setVisible(true); 
     }           

     private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
      jTextField1.setText(""); 
      jTextField2.setText(""); 
     }           

     private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {           
      this.dispose(); 
      Lift l=new Lift(); 
      l.setVisible(true); 
     }           

     private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {           
      System.exit(0); 
     }           


     public static void main(String args[]) { 
      java.awt.EventQueue.invokeLater(new Runnable() { 
       public void run() { 
        new coOwnerShip().setVisible(true); 
       } 
      }); 
     } 

     // Variables declaration - do not modify      
     private javax.swing.JButton jButton1; 
     private javax.swing.JButton jButton2; 
     private javax.swing.JButton jButton3; 
     private javax.swing.JButton jButton4; 
     private javax.swing.JLabel jLabel1; 
     private javax.swing.JLabel jLabel2; 
     private javax.swing.JTextField jTextField1; 
     private javax.swing.JTextField jTextField2; 
     // End of variables declaration     

    }

這裏去第二JFrame類...

public class BuildingCostOutputStream extends javax.swing.JFrame { 


     public BuildingCostOutputStream() 
     { 
      super("Building Output Stream"); 
      initComponents(); 
     } 


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

      jLabel1 = new javax.swing.JLabel(); 
      jLabel2 = new javax.swing.JLabel(); 
      jTextField1 = new javax.swing.JTextField(); 
      jPasswordField1 = new javax.swing.JPasswordField(); 
      jLabel3 = new javax.swing.JLabel(); 
      jTextField2 = new javax.swing.JTextField(); 
      jLabel4 = new javax.swing.JLabel(); 
      jLabel5 = new javax.swing.JLabel(); 
      jTextField3 = new javax.swing.JTextField(); 
      jTextField4 = new javax.swing.JTextField(); 
      jLabel6 = new javax.swing.JLabel(); 
      jTextField5 = new javax.swing.JTextField(); 
      jLabel7 = new javax.swing.JLabel(); 
      jTextField6 = new javax.swing.JTextField(); 
      jLabel8 = new javax.swing.JLabel(); 
      jTextField7 = new javax.swing.JTextField(); 
      jButton1 = new javax.swing.JButton(); 
      jButton2 = new javax.swing.JButton(); 
      jButton3 = new javax.swing.JButton(); 
      jButton4 = new javax.swing.JButton(); 
      jButton5 = new javax.swing.JButton(); 

      setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

      jLabel1.setText("Username:"); 

      jLabel2.setText("PassWord:"); 

      jLabel3.setText("Building Code:"); 

      jLabel4.setText("Month:"); 

      jLabel5.setText("Year:"); 

      jLabel6.setText("Maintenance Cost:"); 

      jLabel7.setText("Heating Cost:"); 

      jLabel8.setText("Co-Ownership Cost:"); 

      jTextField7.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jTextField7ActionPerformed(evt); 
       } 
      }); 

      jButton1.setText("NEXT"); 

      jButton2.setText("SAVE"); 

      jButton3.setText("BACK"); 
      jButton3.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton3ActionPerformed(evt); 
       } 
      }); 

      jButton4.setText("CLEAR"); 
      jButton4.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton4ActionPerformed(evt); 
       } 
      }); 

      jButton5.setText("EXIT"); 
      jButton5.addActionListener(new java.awt.event.ActionListener() { 
       public void actionPerformed(java.awt.event.ActionEvent evt) { 
        jButton5ActionPerformed(evt); 
       } 
      }); 

      org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane()); 
      getContentPane().setLayout(layout); 
      layout.setHorizontalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(163, 163, 163) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
         .add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup() 
          .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
           .add(jLabel1) 
           .add(jLabel2)) 
          .add(34, 34, 34) 
          .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
           .add(jTextField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 389, Short.MAX_VALUE) 
           .add(org.jdesktop.layout.GroupLayout.LEADING, jPasswordField1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 389, Short.MAX_VALUE))) 
         .add(layout.createSequentialGroup() 
          .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
           .add(jLabel3) 
           .add(jLabel4) 
           .add(jLabel6) 
           .add(jLabel7) 
           .add(jLabel8)) 
          .add(21, 21, 21) 
          .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
           .add(org.jdesktop.layout.GroupLayout.LEADING, jTextField2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 204, Short.MAX_VALUE) 
           .add(org.jdesktop.layout.GroupLayout.LEADING, layout.createSequentialGroup() 
            .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
             .add(org.jdesktop.layout.GroupLayout.LEADING, jTextField5, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 98, Short.MAX_VALUE) 
             .add(org.jdesktop.layout.GroupLayout.LEADING, jTextField3, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 98, Short.MAX_VALUE) 
             .add(org.jdesktop.layout.GroupLayout.LEADING, jTextField6, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 98, Short.MAX_VALUE) 
             .add(org.jdesktop.layout.GroupLayout.LEADING, jTextField7, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 98, Short.MAX_VALUE)) 
            .add(106, 106, 106))) 
          .add(1, 1, 1) 
          .add(jLabel5) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
          .add(jTextField4, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 73, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) 
          .addContainerGap()) 
         .add(layout.createSequentialGroup() 
          .add(jButton4) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED) 
          .add(jButton5) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
          .add(jButton2) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
          .add(jButton3) 
          .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
          .add(jButton1)))) 
      ); 
      layout.setVerticalGroup(
       layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING) 
       .add(layout.createSequentialGroup() 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel1) 
         .add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jPasswordField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 28, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) 
         .add(jLabel2)) 
        .add(14, 14, 14) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
         .add(jLabel3) 
         .add(jTextField2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .add(18, 18, 18) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING) 
         .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
          .add(jTextField4, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 28, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE) 
          .add(jLabel5) 
          .add(jLabel4)) 
         .add(jTextField3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 28, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .add(18, 18, 18) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel6) 
         .add(jTextField5, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel7) 
         .add(jTextField6, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .add(30, 30, 30) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jLabel8) 
         .add(jTextField7, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)) 
        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 107, Short.MAX_VALUE) 
        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE) 
         .add(jButton1) 
         .add(jButton5) 
         .add(jButton4) 
         .add(jButton3) 
         .add(jButton2))) 
      ); 

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

     private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {           
      jTextField1.setText(""); 
      jTextField2.setText(""); 
      jTextField3.setText(""); 
      jTextField4.setText(""); 
      jTextField5.setText(""); 
      jTextField6.setText(""); 
      jTextField7.setText(""); 
     }           

     private void jTextField7ActionPerformed(java.awt.event.ActionEvent evt) {            
      // TODO add your handling code here: 
     }           

     private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
      this.dispose(); 
      coOwnerShip C=new coOwnerShip(); 
      C.setVisible(true); 
     }           

     private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {           
      System.exit(0); 
     }           


     public static void main(String args[]) { 
      java.awt.EventQueue.invokeLater(new Runnable() { 
       public void run() { 
        new BuildingCostOutputStream().setVisible(true); 
       } 
      }); 
     } 

     // Variables declaration - do not modify      
     private javax.swing.JButton jButton1; 
     private javax.swing.JButton jButton2; 
     private javax.swing.JButton jButton3; 
     private javax.swing.JButton jButton4; 
     private javax.swing.JButton jButton5; 
     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.JLabel jLabel7; 
     private javax.swing.JLabel jLabel8; 
     private javax.swing.JPasswordField jPasswordField1; 
     private javax.swing.JTextField jTextField1; 
     private javax.swing.JTextField jTextField2; 
     private javax.swing.JTextField jTextField3; 
     private javax.swing.JTextField jTextField4; 
     private javax.swing.JTextField jTextField5; 
     private javax.swing.JTextField jTextField6; 
     private javax.swing.JTextField jTextField7; 
     // End of variables declaration     

    }

來源

2014-09-12 Devilhorn

通過的JTextField組件，你的意思是輸入文本字段的文本？ – 2014-09-12 18:54:48

準確地說...我想在JTextField中編寫文本並將其保存在txt文件中。文本應該來自我創建的第一個和第二個類，因此它可以位於同一個.txt文件中！ – Devilhorn 2014-09-12 19:06:21

好的，我正在寫一個答案。 – 2014-09-12 19:07:26

我們需要做的第一件事就是從JTextField獲取文本，並將其存儲在一個String，像這樣：

String textFieldVal = yourTextField.getText();

然後，我們必須將值寫入到一個文本文件中，就像這樣：

PrintWriter writer = new PrintWriter("textFieldOutput.txt", "UTF-8"); 
writer.println(textFieldVal); 
writer.close();

所以，這是它看起來像你的第一類內容：

String textField1Val = jTextField1.getText(); 
String textField2Val = jTextField2.getText(); 
String textField3Val = jTextField3.getText(); 
String textField4Val = jTextField4.getText(); 
String textField5Val = jTextField5.getText(); 
String textField6Val = jTextField6.getText(); 
String textField7Val = jTextField7.getText();

而當你想將其保存到文本文件：

PrintWriter writer = new PrintWriter("textFieldOutput.txt", "UTF-8"); 
writer.println("First text field:"); 
writer.println(textField1Val); 
writer.println("Second text field:"); 
writer.println(textField2Val); 
writer.println("Third text field:"); 
writer.println(textField3Val); 
writer.println("Fourth text field:"); 
writer.println(textField4Val); 
writer.println("Fifth text field:"); 
writer.println(textField5Val); 
writer.println("Sixth text field:"); 
writer.println(textField6Val); 
writer.println("Seventh text field:"); 
writer.println(textField7Val); 
writer.close();

然而，這將覆蓋該文件，如果它已經存在，所以在你的其他類，這樣做：

try (PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter("textFieldOutput.txt", true)))) { 
writer.println(textField1Val); 
writer.println(textField2Val); 
// etc... 
} catch (IOException e) { 

}

這樣的話，它會添加到該文件，而不是刪除所有文。我希望這有幫助！

編輯：

下面是一個例子ActionListener引用的所有代碼的單個無效：

jTextField1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       saveText(evt); 
      } 
     });

而且課堂中的其他地方：

private void saveText(evt) { 
    String textField1Val = jTextField1.getText(); 
    String textField2Val = jTextField2.getText(); 
    String textField3Val = jTextField3.getText(); 
    String textField4Val = jTextField4.getText(); 
    String textField5Val = jTextField5.getText(); 
    String textField6Val = jTextField6.getText(); 
    String textField7Val = jTextField7.getText(); 

    PrintWriter writer = new PrintWriter("textFieldOutput.txt", "UTF-8"); 
    writer.println("First text field:"); 
    writer.println(textField1Val); 
    writer.println("Second text field:"); 
    writer.println(textField2Val); 
    writer.println("Third text field:"); 
    writer.println(textField3Val); 
    writer.println("Fourth text field:"); 
    writer.println(textField4Val); 
    writer.println("Fifth text field:"); 
    writer.println(textField5Val); 
    writer.println("Sixth text field:"); 
    writer.println(textField6Val); 
    writer.println("Seventh text field:"); 
    writer.println(textField7Val); 
    writer.close(); 
}

來源

2014-09-12 19:17:29

如何將JTextField組件保存在.txt文件中？ （使用Netbeans GUI）

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如何將JTextField組件保存在.txt文件中？（使用Netbeans GUI）