import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo
{
public static void main(String[]args) throws IOException
{
        FileInputStream fis = new FileInputStream(c:\\1.mp3);
        FileOutputStream fos = new FileOutputStream(c:\\2.mp3);
        int ch = 0;
        while((ch = fis.read())!=-1)
        {
                fos.write(ch);
        }
        fos.close();
        fis.close();
       
}
}

没错，你加上“”就可以了
FileInputStream fis = new FileInputStream("c:\\1.mp3"）
FileOutputStream fos = new FileOutputStream("c:\\2.mp3");

FileInputStream fis = new FileInputStream("所在地址要用引号括起来");

拿币走人

    FileInputStream fis = new FileInputStream(“c:\\1.mp3”);
        FileOutputStream fos = new FileOutputStream(“c:\\2.mp3”);

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