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Objects (Guava Libraries 2010.01.04)
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com.google.common.base
 
Class Objects</H2>
<PRE>
<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
 <IMG SRC="../../../../resources/inherit.gif" ALT="extended by ">com.google.common.base.Objects
</PRE>
<HR>
<DL>
<DT><PRE>public final class Objects<DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>

Helper functions that can operate on any <code>Object</code>.

<DL>
<DT>Since:</DT>
 <DD>2010.01.04 stable (imported from Google Collections Library)</DD>
<DT>Author:</DT>
 <DD>Laurence Gonsalves</DD>
</DL>
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<CODE>static class</CODE></TD>
<TD><CODE><A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A></CODE>

Support class for <A HREF="../../../../com/google/common/base/Objects.html#toStringHelper(java.lang.Object)"><CODE>toStringHelper(java.lang.Object)</CODE></A>.</TD>
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<CODE>static boolean</CODE></TD>
<TD><CODE><A HREF="../../../../com/google/common/base/Objects.html#equal(java.lang.Object, java.lang.Object)">equal</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> a,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> b)</CODE>

Determines whether two possibly-null objects are equal.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static int</CODE></TD>
<TD><CODE><A HREF="../../../../com/google/common/base/Objects.html#hashCode(java.lang.Object...)">hashCode</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>... objects)</CODE>

Generates a hash code for multiple values.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A></CODE></TD>
<TD><CODE><A HREF="../../../../com/google/common/base/Objects.html#toStringHelper(java.lang.Object)">toStringHelper</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> object)</CODE>

Creates an instance of <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base"><CODE>Objects.ToStringHelper</CODE></A>.</TD>
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<TH ALIGN="left">Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<A NAME="equal(java.lang.Object, java.lang.Object)"></A><H3>
equal</H3>
<PRE>
public static boolean equal(<A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A>
 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> a,
 <A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A>
 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> b)</PRE>
<DL>
<DD>Determines whether two possibly-null objects are equal. Returns:

<ul>
 <li><code>true</code> if <code>a</code> and <code>b</code> are both null.
 <li><code>true</code> if <code>a</code> and <code>b</code> are both non-null and they are
 equal according to <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang"><CODE>Object.equals(Object)</CODE></A>.
 <li><code>false</code> in all other situations.
 </ul>

This assumes that any non-null objects passed to this function conform
 to the <code>equals()</code> contract.

<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode(java.lang.Object...)"></A><H3>
hashCode</H3>
<PRE>
public static int hashCode(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>... objects)</PRE>
<DL>
<DD>Generates a hash code for multiple values. The hash code is generated by
 calling <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Arrays.html?is-external=true#hashCode(java.lang.Object[])" title="class or interface in java.util"><CODE>Arrays.hashCode(Object[])</CODE></A>.

This is useful for implementing <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang"><CODE>Object.hashCode()</CODE></A>. For example,
 in an object that has three properties, <code>x</code>, <code>y</code>, and
 <code>z</code>, one could write:
 <pre>
 public int hashCode() {
 return Objects.hashCode(getX(), getY(), getZ());
 }</pre>

Warning: When a single object is supplied, the returned hash code
 does not equal the hash code of that object.

<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toStringHelper(java.lang.Object)"></A><H3>
toStringHelper</H3>
<PRE>
public static <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A> toStringHelper(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> object)</PRE>
<DL>
<DD>Creates an instance of <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base"><CODE>Objects.ToStringHelper</CODE></A>.

This is helpful for implementing <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang"><CODE>Object.toString()</CODE></A>. For
 example, in an object that contains two member variables, <code>x</code>,
 and <code>y</code>, one could write:<pre> <tt>
 public class ClassName {
 public String toString() {
 return Objects.toStringHelper(this)
 .add("x", x)
 .add("y", y)
 .toString();
 }
 }</tt>
 </pre>

Assuming the values of <code>x</code> and <code>y</code> are 1 and 2,
 this code snippet returns the string <tt>"ClassName{x=1, y=2}"</tt>.

<DD><DL>
<DT>Since:</DT>
 <DD>2010.01.04 tentative</DD>
</DL>
</DD>
</DL>

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com.google.common.base</FONT>
<BR>
Class Objects</H2>
<PRE>
<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.base.Objects</B>
</PRE>
<HR>
<DL>
<DT><PRE>public final class <B>Objects</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>

<P>
Helper functions that can operate on any <code>Object</code>.
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2010.01.04 <b>stable</b> (imported from Google Collections Library)</DD>
<DT><B>Author:</B></DT>
  <DD>Laurence Gonsalves</DD>
</DL>
<HR>

<P>
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<CODE>static&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A></B></CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Support class for <A HREF="../../../../com/google/common/base/Objects.html#toStringHelper(java.lang.Object)"><CODE>toStringHelper(java.lang.Object)</CODE></A>.</TD>
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<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/common/base/Objects.html#equal(java.lang.Object, java.lang.Object)">equal</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;a,
      <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;b)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Determines whether two possibly-null objects are equal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/common/base/Objects.html#hashCode(java.lang.Object...)">hashCode</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>...&nbsp;objects)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Generates a hash code for multiple values.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/google/common/base/Objects.html#toStringHelper(java.lang.Object)">toStringHelper</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;object)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates an instance of <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base"><CODE>Objects.ToStringHelper</CODE></A>.</TD>
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<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<A NAME="equal(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
equal</H3>
<PRE>
public static boolean <B>equal</B>(<FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT>
                            <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;a,
                            <FONT SIZE="-1"><A HREF="http://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/Nullable.html?is-external=true" title="class or interface in javax.annotation">@Nullable</A></FONT>
                            <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;b)</PRE>
<DL>
<DD>Determines whether two possibly-null objects are equal. Returns:

 <ul>
 <li><code>true</code> if <code>a</code> and <code>b</code> are both null.
 <li><code>true</code> if <code>a</code> and <code>b</code> are both non-null and they are
     equal according to <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang"><CODE>Object.equals(Object)</CODE></A>.
 <li><code>false</code> in all other situations.
 </ul>

 <p>This assumes that any non-null objects passed to this function conform
 to the <code>equals()</code> contract.
<P>
<DD><DL>
</DL>
</DD>
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<A NAME="hashCode(java.lang.Object...)"><!-- --></A><H3>
hashCode</H3>
<PRE>
public static int <B>hashCode</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>...&nbsp;objects)</PRE>
<DL>
<DD>Generates a hash code for multiple values. The hash code is generated by
 calling <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Arrays.html?is-external=true#hashCode(java.lang.Object[])" title="class or interface in java.util"><CODE>Arrays.hashCode(Object[])</CODE></A>.

 <p>This is useful for implementing <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang"><CODE>Object.hashCode()</CODE></A>. For example,
 in an object that has three properties, <code>x</code>, <code>y</code>, and
 <code>z</code>, one could write:
 <pre>
 public int hashCode() {
   return Objects.hashCode(getX(), getY(), getZ());
 }</pre>

 <b>Warning</b>: When a single object is supplied, the returned hash code
 does not equal the hash code of that object.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toStringHelper(java.lang.Object)"><!-- --></A><H3>
toStringHelper</H3>
<PRE>
public static <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base">Objects.ToStringHelper</A> <B>toStringHelper</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A>&nbsp;object)</PRE>
<DL>
<DD>Creates an instance of <A HREF="../../../../com/google/common/base/Objects.ToStringHelper.html" title="class in com.google.common.base"><CODE>Objects.ToStringHelper</CODE></A>.

 <p>This is helpful for implementing <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang"><CODE>Object.toString()</CODE></A>. For
 example, in an object that contains two member variables, <code>x</code>,
 and <code>y</code>, one could write:<pre>   <tt>
   public class ClassName {
     public String toString() {
       return Objects.toStringHelper(this)
           .add("x", x)
           .add("y", y)
           .toString();
     }
   }</tt>
 </pre>

 Assuming the values of <code>x</code> and <code>y</code> are 1 and 2,
 this code snippet returns the string <tt>"ClassName{x=1, y=2}"</tt>.
<P>
<DD><DL>
<DT><B>Since:</B></DT>
  <DD>2010.01.04 <b>tentative</b></DD>
</DL>
</DD>
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