用文件类实现复制功能

/*
 * couter:苏奕祥
 * 实现两个文件的复制功能并且用到正则表达式替换复制完后的值
 *
 */

import
 java.io.*;
import
 java.util.regex.Matcher;
import
 java.util.regex.Pattern;
    public
 
class
 CopyFile {
        public
 
static
 
void
 main(String[] args)
throws
 IOException{
            File f=new
 File(
"E:\\sdx.txt"
);
            File f2=new
 File(
"E:\\sdxcopy.txt"
);
            Writer copy=new
 FileWriter(f2);
                Writer aaa=null
;
                aaa=new
 FileWriter(f);
                aaa.write("I LOVE U I LOVE U I LOVE U\r\nI LOVE U I LOVE U I LOVE U\r\nI LOVE U I LOVE U I LOVE U"
);
                aaa.close();

                Reader read=null
;
                read=new
 FileReader(f);
                char
 c[]=
new
 
char
[
1024
];
                int
 len=read.read(c);
                System.out.println(len);
        [color=blue][/color]        read.close();
                String str=new
 String(c,
0
,len);
                System.out.println("内容为："
+str);

            Pattern p=Pattern.compile("LOVE"
);
            Matcher m=p.matcher(str);
            String str2=m.replaceAll("HATE"
);
            System.out.println(str2);
            copy.write(str2);
            copy.close();


    }
}