Question

java filereader filewriter怎么使用，哪个是读入，哪个是输出的内容

Answer 1

import java.io.*;
class MyTest{
public static void main(String[] args)throws Exception{
FileReader fr=new FileReader("MyTest.java");
FileWriter fw=new FileWriter("out.txt");
int hasread=-1;
char[] ch=new char[16];
try{
while((hasread=fr.read(ch))>0){
System.out.print(new String(ch,0,hasread));
fw.write(ch,0,hasread);
}
}catch(IOException e){
}
finally{
if(fr!=null)
fr.close();
if(fw!=null)
fw.close();
}
}
}