Java InputStream Read Long readLong(InputStream in)

Description

read Long

License

Apache License

Declaration

public static final long readLong(InputStream in) throws IOException 

Method Source Code

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

import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    public static final long readLong(InputStream in) throws IOException {
        byte[] b = new byte[8];
        read(in, b, 0, b.length);//from   w w  w  .  ja  va2 s .c  o m
        long l = (long) (b[0] & 0xff);
        l |= (long) (b[1] & 0xff) << 8;
        l |= (long) (b[2] & 0xff) << 16;
        l |= (long) (b[3] & 0xff) << 24;
        l |= (long) (b[4] & 0xff) << 32;
        l |= (long) (b[5] & 0xff) << 40;
        l |= (long) (b[6] & 0xff) << 48;
        l |= (long) (b[7] & 0xff) << 56;
        return l;
    }

    public static final void read(InputStream in, byte[] b, int offset, int length) throws IOException {
        for (int got = 0; length > 0;) {
            got = in.read(b, offset, length);
            if (got < 0) {
                throw new EOFException();
            }
            offset += got;
            length -= got;
        }
    }

    public static final byte read(InputStream in) throws IOException {
        int got = in.read();
        if (got < 0) {
            throw new EOFException();
        }
        return (byte) (got & 0xff);
    }
}

Related

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