將文本文件加載到JtextArea

我一直試圖花幾個小時嘗試將文本文件的內容加載到JTextArea中。我能夠將文本加載到控制檯中，但不能加入到JTextArea中我不知道我在做什麼錯誤。任何幫助表示感謝，謝謝！將文本文件加載到JtextArea

的程序

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 
import java.io.*; 


public class LoadClass extends JPanel 
{ 
    JPanel cards; 
    private JPanel card1; 
    private JTextArea textarea1; 
    private int currentCard = 1; 
    private JFileChooser fc; 

    public LoadClass() 
    { 
     Font mono = new Font("Monospaced", Font.PLAIN, 12); 

     textarea1 = new JTextArea(); 
     textarea1.setFont(mono); 



     card1 = new JPanel(); 
     card1.add(textarea1); 




     cards = new JPanel(new CardLayout()); 
     cards.add(card1, "1"); 


     add(cards, BorderLayout.CENTER); 



     setBorder(BorderFactory.createTitledBorder("Animation here")); 
     setFont(mono); 
    } 

    public void Open() 
    { 
     textarea1 = new JTextArea(); 


     JFileChooser chooser = new JFileChooser(); 
     int actionDialog = chooser.showOpenDialog(this); 
     if (actionDialog == JFileChooser.APPROVE_OPTION) 
     { 
      File fileName = new File(chooser.getSelectedFile() + ""); 
      if(fileName == null) 
       return; 
      if(fileName.exists()) 
      { 
       actionDialog = JOptionPane.showConfirmDialog(this, 
            "Replace existing file?"); 
       if (actionDialog == JOptionPane.NO_OPTION) 
        return; 
      } 
      try 
      { 

       String strLine; 
       File f = chooser.getSelectedFile(); 
       BufferedReader br = new BufferedReader(new FileReader(f)); 

       while((strLine = br.readLine()) != null) 
       { 
        textarea1.append(strLine + "\n"); 

        System.out.println(strLine); 

       } 
      } 
      catch(Exception e) 
      { 
       System.err.println("Error: " + e.getMessage()); 
      } 
     } 
    } 

}

類主程序

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 

public class LoadMain extends JFrame 
{ 

    private LoadClass canvas; 

    private JPanel buttonPanel; 
    private JButton btnOne; 



    public LoadMain() 
    { 

     super("Ascii Art Program"); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     setLayout(new BorderLayout()); 
     canvas = new LoadClass(); 

     buildButtonPanel(); 

     add(buttonPanel, BorderLayout.SOUTH); 
     add(canvas, BorderLayout.CENTER); 

     pack(); 
     setSize(800, 800); 
     setVisible(true); 

    } 
    private void buildButtonPanel() 
    { 
     buttonPanel = new JPanel(); 

     btnOne = new JButton("Load"); 


     buttonPanel.add(btnOne); 



     btnOne.addActionListener(new btnOneListener()); 


    } 
    private class btnOneListener implements ActionListener 
    { 
     public void actionPerformed(ActionEvent e) 
     { 
      if (e.getSource() == btnOne) 
      { 
       canvas.Open(); 
      } 
     } 
    } 


    public static void main(String[] args) 
    { 
     new LoadMain(); 
    } 

}

來源

2012-04-02 FireStorm

嘗試將行存儲在一個字符串中，然後textArea.setText（）？ – Giannis 2012-04-02 23:21:28

1）爲了更快地獲得更好的幫助，請發佈[SSCCE]（http://sscce.org/）。 2）請學習常見的[Java命名約定]（http://java.sun.com/docs/books/jls/second_edition/html/names.doc.html#73307）（具體用於名稱的情況）類，方法和屬性名稱並一致使用它。 – 2012-04-02 23:22:49

這是功課嗎？ – Peter 2012-04-02 23:34:43

public void Open() 
{ 
    textarea1 = new JTextArea();

修改成：

public void Open() 
{ 
    //textarea1 = new JTextArea(); // or remove completely

創建的第二個領域是令人困惑的事情。

來源

2012-04-02 23:22:11

你是一個救星！ – FireStorm 2012-04-03 02:07:28

將文本文件加載到JtextArea

回答

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