java:IO流(自定义字符数组的拷贝)

版权声明：本文为博主原创文章，未经博主允许不得转载 https://blog.csdn.net/qq_24644517/article/details/83588621

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

public class Demo3_Copy {

	public static void main(String[] args) throws IOException {
		FileReader fr=new FileReader("xxx.txt");
		FileWriter fw=new FileWriter("zzz.txt");
		
		int b;
		char[]  arr=new char[1024];
		while((b=fr.read(arr))!=-1) {
			System.out.println(b);
			fw.write(arr, 0, b);
		}
		fr.close();
		fw.close();
		}
}