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  • java第四次作业

    package lianxi;

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

    复制代码
    public class CopyFile {
    public static void copy(File a,File b){
        try {
            FileInputStream fis = new FileInputStream("a.mp3");
            FileOutputStream fos = new FileOutputStream("temp.mp3");
            byte[] buf = new byte[1024];
            int len;
            int read = fis.read();
            while((len = fis.read(buf))!=-1){
                fos.write(buf, 0, len);
            }
            fis.close();
            fos.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        File a = new File("");
        File b = new File("");
        long start,end;
        start = System.currentTimeMillis();
        copy(a,b);
        end = System.currentTimeMillis();
        System.out.println("复制所用时间:" + (end - start) + "ms");
    }
    }
    复制代码
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  • 原文地址:https://www.cnblogs.com/bandaoruoruo/p/5401668.html
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