java拷贝字符文件

1、java拷贝字符文件

2、代码如下：

package Demo1;

import java.io.*;

public class copyfile {

    public static void main(String[] args) {

        try {

            cp();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public static void cp() throws IOException

    {

        FileWriter fw=null;

        FileReader fr=null;

        char a[]=new char[];

        int len=;

        fr=new FileReader("D:\\Eclipse_jee_java\\javaDemo\\Demo1\\src\\Demo1\\demo1.java");

        fw=new FileWriter("F:\\copy.text");

        while((len=fr.read(a))!=-)

        {

            fw.write(a, , len);

        }

        fr.close();

        fw.close();

    }

}