练习复制java文件

package com.io.liushuaishuai;

import java.io.*;

public class copyjavaDemo {
public static void main(String[] args) throws IOException {
 InputStreamReader isr = new InputStreamReader(new FileInputStream("C:Users86132IdeaProjectsjavaSE_CodemyIOstreamsrccomioliushuaishuaiBufferStreamDemo.java"));
 OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("C:Users86132IdeaProjectsjavaSE_CodemyIOstreamsrccomioliushuaishuaicopy.java"));


 //一次读取一个字符数据
 /*
 int i;
 while((i= isr.read())!= -1) {
 osw.write(i);
 }
 osw.close();
 isr.close();
 */
 //一次读取一个字符数组
 char[] a = new char[1024];
 int len;
 while ((len = isr.read(a)) != -1) {
 osw.write(a,0,len);
 }

 osw.close();
 isr.close();

 }}