Module openj9.dtfj

Package com.ibm.dtfj.corereaders.zos.util

Class IntegerMap

java.lang.Object

com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

com.ibm.dtfj.corereaders.zos.util.IntegerMap

All Implemented Interfaces:

Serializable

public final class IntegerMap
extends AbstractHashMap

This is a simple class to map one integer to another but without the overhead of using a Hashtable. There is one limitation at present which is that the value of -1 can't be used since this is currently used to indicate value not found.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
IntegerMap()

Method Summary

Modifier and Type	Method	Description
long	get(long key)	Returns the value mapped by the given key.
static void	main(String[] args)	Run some basic tests on this class.
int	memoryUsage()
void	put(long key, long value)	Add the key/value pair to the map.
long	remove(long key)	Remove the key from the map and return the old value.

Methods declared in class com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

getKeys, getKeysArray

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

IntegerMap

public IntegerMap()

Method Details

get

public long get(long key)

Returns the value mapped by the given key.

Returns:

the value or -1 if it cannot be found

put

public void put(long key,
 long value)

Add the key/value pair to the map. The value must not be -1.

remove

public long remove(long key)

Remove the key from the map and return the old value.

memoryUsage

public int memoryUsage()

main

public static void main(String[] args)

Run some basic tests on this class.