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Memory
Class Address  

java.lang.Object
  Memory.Address

Direct Known Subclasses:

CodeAddress, HeapAddress, StackAddress

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public abstract class Address

extends java.lang.Object

Version:

$Id: Address.java,v 1.5 2003/03/05 08:35:33 joewhaley Exp $

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Field Summary
static Clazz.jq_Class	_class

 

Constructor Summary

Address()

 

Method Summary
abstract  Address	align(int shift)
static int	align(int val, int shift)
protected  java.lang.Object	clone()           This method may be called to create a new copy of the Object.
abstract  int	difference(Address v)
boolean	equals(java.lang.Object arg0)           Determine whether this Object is semantically equal to another Object.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
abstract  boolean	isNull()
abstract  Address	offset(int offset)
abstract  Address	peek()
abstract  byte	peek1()
abstract  short	peek2()
abstract  int	peek4()
abstract  long	peek8()
abstract  void	poke(Address v)
abstract  void	poke1(byte v)
abstract  void	poke2(short v)
abstract  void	poke4(int v)
abstract  void	poke8(long v)
abstract  java.lang.String	stringRep()
abstract  int	to32BitValue()
java.lang.String	toString()           Convert this Object to a human-readable String.

 

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

_class

public static final Clazz.jq_Class _class

Constructor Detail

Address

public Address()

Method Detail

peek

public abstract Address peek()

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peek1

public abstract byte peek1()

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peek2

public abstract short peek2()

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peek4

public abstract int peek4()

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peek8

public abstract long peek8()

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poke

public abstract void poke(Address v)

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poke1

public abstract void poke1(byte v)

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poke2

public abstract void poke2(short v)

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poke4

public abstract void poke4(int v)

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poke8

public abstract void poke8(long v)

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offset

public abstract Address offset(int offset)

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align

public abstract Address align(int shift)

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difference

public abstract int difference(Address v)

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isNull

public abstract boolean isNull()

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to32BitValue

public abstract int to32BitValue()

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stringRep

public abstract java.lang.String stringRep()

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align

public static final int align(int val,
                              int shift)

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clone

protected final java.lang.Object clone()
                                throws java.lang.CloneNotSupportedException

Description copied from class: java.lang.Object

This method may be called to create a new copy of the Object. The typical behavior is as follows:

• o == o.clone() is false
• o.getClass() == o.clone().getClass() is true
• o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object)>Object.equals(Object) 55 .

If the Object you call clone() on does not implement java.lang.Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 

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equals

public final boolean equals(java.lang.Object arg0)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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hashCode

public final int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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toString

public final java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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Home >> All >> [ Memory overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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