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## org.apache.commons.lang.mutable
Interface Mutable

All Known Implementing Classes:
  MutableBoolean, MutableByte, MutableDouble, MutableFloat, MutableInt, MutableLong, MutableObject, MutableShort

    public interface Mutable

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
Version:
  $Id: Mutable.java 905636 2010-02-02 14:03:32Z niallp $
Author:
  Apache Software Foundation, Matthew Hawthorne

Method Summary
`Object` | `getValue()` Gets the value of this mutable.
`void` | `setValue(Object value)` Sets the value of this mutable.

Method Detail

### getValue

    Object getValue()

  Gets the value of this mutable.

  Returns:
    the stored value

### setValue

    void setValue(Object value)

  Sets the value of this mutable.

  Parameters:
    `value` - the value to store
  Throws:
    `NullPointerException` - if the object is null and null is invalid
    `ClassCastException` - if the type is invalid

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