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package fileIo;  
 
import  java.io.BufferedReader;  
import  java.io.BufferedWriter;  
import  java.io.File;  
import  java.io.FileReader;  
import  java.io.FileWriter;  
 
 public   class  ReadTextFile   {  
    public  BufferedReader bufread;  
    public  BufferedWriter bufwriter;  
   File writefile;  
   String filepath, filecontent, read;  
   String readStr  =   "" ;  
    // ´ÓÎı¾ÎļþÖжÁÈ¡ÄÚÈÝ   
     public  String readfile(String path)     
      {  
         try    {  
           filepath  =  path;  // µÃµ½Îı¾ÎļþµÄ·¾¶   
            File file  =   new  File(filepath);  
           FileReader fileread  =   new  FileReader(file);  
           bufread  =   new  BufferedReader(fileread);  
             while  ((read  =  bufread.readLine())  !=   null )   {  
               read  =  read + " \r\n " ;              
          


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# rpm -q jdk
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# java -version
<2># rpm -qa | grep gcj ← È·ÈÏgcjµÄ°æ±¾ºÅ
<3># yum -y remove java-1.4.2-gcj-compat ← Ð¶ÔØgcj
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public class Hello{
    public static void main(String[] args){
        int i  = 5 ,  j = 2;
        System.out.println(i+j);
      ......

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