com.aliyun.odps.io

Class IntWritable

java.lang.Object

com.aliyun.odps.io.IntWritable

All Implemented Interfaces:

Writable, WritableComparable, Comparable

public class IntWritable
extends Object
implements WritableComparable

IntWritable 提供了 int 的 Writable 和 WritableComparable 的实现

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IntWritable.Comparator IntWritable 对象的 WritableComparator 自然顺序实现（升序）.

Constructor Summary

Constructors

Constructor and Description
IntWritable() 默认构造int 值为0的 IntWritable.
IntWritable(int value) 构造int 值为给定 value 的 IntWritable.

Method Summary

Modifier and Type	Method and Description
int	compareTo(Object o) 比较两个 IntWritable 的值.
boolean	equals(Object o) 判断两个 IntWritable 是否相等.
int	get() 返回此 IntWritable 的值
int	hashCode() 计算哈希值，直接返回此 IntWritable 的值.
void	readFields(DataInput in) 从指定的 DataInput in 反序列化.
void	set(int value) 设置 IntWritable 的值
String	toString()
void	write(DataOutput out) 序列化到指定的 DataOutput out.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

IntWritable

public IntWritable()

默认构造int 值为0的 IntWritable.

IntWritable

public IntWritable(int value)

构造int 值为给定 value 的 IntWritable.

Parameters:

value -

Method Detail

set

public void set(int value)

设置 IntWritable 的值

Parameters:

value -

get

public int get()

返回此 IntWritable 的值

Returns:

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

从指定的 DataInput in 反序列化.

Specified by:

readFields in interface Writable

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

序列化到指定的 DataOutput out.

Specified by:

write in interface Writable

Throws:

IOException

equals

public boolean equals(Object o)

判断两个 IntWritable 是否相等.

如果两个都是 IntWritable 且值相等，返回true，否则返回false

Overrides:

equals in class Object

Parameters:

o -

Returns:

hashCode

public int hashCode()

计算哈希值，直接返回此 IntWritable 的值.

Overrides:

hashCode in class Object

compareTo

public int compareTo(Object o)

比较两个 IntWritable 的值.

Specified by:

compareTo in interface Comparable

Parameters:

o - 比较对象

Returns:

(this < o ? -1 : (this == o) ? 0 ：1))

toString

public String toString()

Overrides:

toString in class Object