javolution.lang

Interface ValueType

All Known Implementing Classes:

CharSet, Index, QName, Text

@Constant
public interface ValueType

A constant object which can be manipulated by value rather than by reference; a JVM implementation may allocate instances of this class on the stack.

 public class Complex implements ValueType { // Complex numbers can be manipulated by value.
     ...
     
     @Override
     public boolean equals(Object obj) { ... } // Must compare values.
 
     @Override
     public int hashCode() { ... } // Must return value hash code.    
 }
 

Note: "Stack" allocation is not the only optimization that a VM can do on ValueType. The VM might decide not to perform any allocation at all and store values directly in registers.

Version:

6.1, February 2, 2014

Author:

Jean-Marie Dautelle

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj) Returns true if this object has the same value content as the the one specified; false otherwise.
int	hashCode() Returns the hash code of the value content of this object.

Method Detail

equals

boolean equals(Object obj)

Returns true if this object has the same value content as the the one specified; false otherwise. The default object equals must be overridden to ensure the same behavior whether or not the instance is allocated on the stack.

Overrides:

equals in class Object

hashCode

int hashCode()

Returns the hash code of the value content of this object.

Overrides:

hashCode in class Object