将文本文件加载到文本区域

将文本文件加载到文本区域

使用所有Swing文本组件都支持的read（…）和write（…）方法。简单的例子：

import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.text.*;class textareaLoad{    public static void main(String a[])    {        final Jtextarea edit = new Jtextarea(30, 60);        edit.setText("onentwonthree");        edit.append("nfournfive");        JButton read = new JButton("Read textareaLoad.txt");        read.addActionListener( new ActionListener()        { public void actionPerformed(ActionEvent e) {     try     {         FileReader reader = new FileReader( "textareaLoad.txt" );         BufferedReader br = new BufferedReader(reader);         edit.read( br, null );         br.close();         edit.requestFocus();     }     catch(Exception e2) { System.out.println(e2); } }        });        JButton write = new JButton("Write textareaLoad.txt");        write.addActionListener( new ActionListener()        { public void actionPerformed(ActionEvent e) {     try     {         FileWriter writer = new FileWriter( "textareaLoad.txt" );         BufferedWriter bw = new BufferedWriter( writer );         edit.write( bw );         bw.close();         edit.setText("");         edit.requestFocus();     }     catch(Exception e2) {} }        });        Jframe frame = new Jframe("textarea Load");        frame.getContentPane().add( new JScrollPane(edit), BorderLayout.NORTH );        frame.getContentPane().add(read, BorderLayout.WEST);        frame.getContentPane().add(write, BorderLayout.EAST);        frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        frame.pack();        frame.setLocationRelativeTo( null );        frame.setVisible(true);    }}