THE PACKAGE JAVA.IO

java.io.DataInput

22.1

22.1.11

public long readLong() throws IOException

The general contract of

readLong

 is that it reads eight input bytes and returns a

long

 value. Let

a

 be the first byte read,

b

 be the second byte,

c

 be the third byte,

d

be the fourth byte,

e

 be the fifth byte,

f

 be the sixth byte,

g

 be the seventh byte,

and

h

 be the eighth byte. The value returned is:

(((long)(a & 0xff) << 56) |

((long)(b & 0xff) << 48) |

((long)(c & 0xff) << 40) |

((long)(d & 0xff) << 32) |

((long)(e & 0xff) << 24) |

((long)(f & 0xff) << 16) |

((long)(g & 0xff) <<

8) |

((long)(h & 0xff)))

This method is suitable for reading bytes written by the

writeLong

 method of

interface

DataOutput

 ( 22.2.9).

22.1.12

public float readFloat() throws IOException

The general contract of

readFloat

 is that it reads four input bytes and returns a

float

 value. It does this by first constructing an

int

 value in exactly the manner

of the

readInt

 method ( 22.1.10), then converting this

int

 value to a

float

 in

exactly the manner of the method

Float.intBitsToFloat

 ( 20.9.23).

This method is suitable for reading bytes written by the

writeFloat

 method

of interface

DataOutput

 ( 22.2.10).

22.1.13

public double readDouble() throws IOException

The general contract of

readDouble

 is that it reads eight input bytes and returns a

double

 value. It does this by first constructing a

long

 value in exactly the manner

of the

readlong

 method ( 22.1.11), then converting this

long

 value to a

double

in exactly the manner of the method

Double.longBitsToDouble

 ( 20.10.22).

This method is suitable for reading bytes written by the

writeDouble

 method

of interface

DataOutput

 ( 22.2.11).

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