java - 简写为[]

Question

如何从Java文件中获取短（16位）数组？

这是我尝试的：

final static String FILE_NAME_INPUT = "./example.txt";

public static void main(String[] args) {
    readFile(FILE_NAME_INPUT);
}

public static void readFile(String filename) {
    short[] buffer = null;
    File a_file = new File(filename);
    try {
        File file = new File(filename);

        FileInputStream fis = new FileInputStream(filename);
        DataInputStream dis = new DataInputStream(fis);

        int length = (int)a_file.length();
        buffer = new short[length];

        //dis.readShort(buffer); DOESN'T WORK

        for(int i = 0; i < length; i++) {
            System.out.println("buffer[" + i + "]: " + buffer[i]);
        }

        dis.close();
    }
    catch(FileNotFoundException fe) {
        System.out.println("FileNotFoundException: " + fe);
    }
    catch(IOException ioe) {
        System.out.println("IOException: " + ioe);
    }
}

但是行 dis.readShort(buffer)不起作用，因为 readShort()必须没有参数。

谢谢

Answer 1

您的缓冲区数组为空，但是如果要检查DataInputStream，可以使用类似的内容

    int counter =0;
    while(dis.available()>0)
             {
                // read two bytes from data input

                short s = dis.readShort();

                // print the short value
                buffer[counter] = s;
                System.out.print(s+" ");
                counter++;
         }