读取源文件，并用TextArea显示

68 阅读 0 评论 45 点赞

我是靠谱客的博主称心棒棒糖，最近开发中收集的这篇文章主要介绍读取源文件，并用TextArea显示，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

刚开始学java，觉得java是一门较为安全的语言。比如在打开、关闭、读写文件的时候必须加上try...catch...语句，分别捕捉FileNotFoundException和IOException异常，否则程序在无法编译。

import java.io.*;
import java.awt.*;
import java.awt.event.*;
class WinListen implements WindowListener
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowOpened(WindowEvent e){}
public void windowClosed(WindowEvent e){}
};

class TextAreaDemo
{
public static void main(String[] args)
{
  Frame fillTextArea = new Frame("TextArea Demo");
  TextArea printFile = new TextArea(30, 60);
  fillTextArea.add(printFile);
  String oneLine;

  try
  {
   BufferedReader buf = new BufferedReader(new FileReader("TextAreaDemo.java"));
   while ((oneLine = buf.readLine()) != null)
   {
    printFile.append(oneLine + '/n');
   }
   buf.close();
  }
  catch(FileNotFoundException e)
  {
   System.out.println("can not open the file!");
  }
  catch(IOException e)
  {
   System.out.println("can not read the file!");
  }

  fillTextArea.pack();
  fillTextArea.setVisible(true);
  fillTextArea.addWindowListener(new WinListen());
}
}