DataInputStream.readLong

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Syntax

public final long readLong() throws IOException

Returns

the next eight bytes of this input stream, interpreted as a long.

Description

Reads a signed 64-bit integer from this data input stream. This method reads eight bytes from the underlying input stream. If the bytes read, in order, are b1, b2, b3, b4, b5, b6, b7, and b8, where

0 <= b1, b2, b3, b4, b5, b6, b7, b8 <= 255,

then the result is equal to:

     ((long)b1 << 56) + ((long)b2 << 48) +
        ((long)b3 << 40) + ((long)b4 << 32) +
        ((long)b5 << 24) + (b6 << 16) +
        (b7 << 8) + b8

This method blocks until the eight bytes are read, the end of the stream is detected, or an exception is thrown.

Exceptions

EOFException if this input stream reaches the end before reading eight bytes.

Exceptions

IOException if an I/O error occurs.