复制java文件改进版 FileWriter&FileReader

package com.io.liushuaishuai;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class copyjavaDemo02 {

    public static void main(String[]args) throws IOException {
        FileReader fr = new FileReader("myIOstream\fos.txt");
        FileWriter fw = new FileWriter("myIOstream\java.txt");

        int ch;
        while ((ch= fr.read()) != -1) {
            fw.write(ch);
        }
        fr.close();
        fw.close();

    }
}