Java DataInput Read Long readLong(DataInput in)

Description

read Long

License

LGPL

Declaration

public static long readLong(DataInput in) throws Exception 

Method Source Code

//package com.java2s;
//License from project: LGPL 

import java.io.*;

public class Main {
    public static long readLong(DataInput in) throws Exception {
        byte len = in.readByte();
        if (len == 0)
            return 0;
        byte[] buf = new byte[len];
        in.readFully(buf, 0, len);/*from  w  w  w. j a v a 2s.c  o  m*/
        return makeLong(buf, 0, len);
    }

    static long makeLong(byte[] buf, int offset, int len) {
        long retval = 0;
        for (int i = 0; i < len; i++) {
            byte b = buf[offset + i];
            retval |= ((long) b & 0xff) << (i * 8);
        }
        return retval;
    }
}

Related

1. readLong(DataInput dataInput)
2. readLong(DataInput in)
3. readLongSequence(DataInput in)
4. readLongUTF8(DataInput in)