Package org.apache.commons.lang3.mutable

Interface Mutable<T>

Type Parameters:

T - the type to set and get

All Known Implementing Classes:

MutableBoolean, MutableByte, MutableDouble, MutableFloat, MutableInt, MutableLong, MutableObject, MutableShort

public interface Mutable<T>

Provides mutable access to a value.

Mutable is used as a generic interface to the implementations in this package.

A typical use case would be to enable a primitive or string to be passed to a method and allow that method to effectively change the value of the primitive/string. Another use case is to store a frequently changing primitive in a collection (for example a total in a map) without needing to create new Integer/Long wrapper objects.

Since:

2.1

Method Summary

Modifier and Type	Method	Description
T	getValue()	Gets the value of this mutable.
void	setValue(T value)	Sets the value of this mutable.

Method Detail

getValue

T getValue()

Gets the value of this mutable.

Returns:

the stored value

setValue

void setValue(T value)

Sets the value of this mutable.

Parameters:

value - the value to store

Throws:

java.lang.NullPointerException - if the object is null and null is invalid

java.lang.ClassCastException - if the type is invalid