java.util.Objects

public final class Objects
extends Object

Utility methods for objects.

Since:: 1.7

Method Summary

Modifier and Type	Method	Description
`static <T> int`	`compare(T a, T b, Comparator<? super T> c)`	Returns 0 if `a == b`, or `c.compare(a, b)` otherwise.
`static boolean`	`deepEquals(Object a, Object b)`	Returns true if both arguments are null, the result of `Arrays.equals(byte[], byte[])` if both arguments are primitive arrays, the result of `Arrays.deepEquals(java.lang.Object[], java.lang.Object[])` if both arguments are arrays of reference types, and the result of `equals(java.lang.Object, java.lang.Object)` otherwise.
`static boolean`	`equals(Object a, Object b)`	Null-safe equivalent of `a.equals(b)`.
`static int`	`hash(Object... values)`	Convenience wrapper for `Arrays.hashCode(boolean[])`, adding varargs.
`static int`	`hashCode(Object o)`	Returns 0 for null or `o.hashCode()`.
`static <T> T`	`requireNonNull(T o)`	Returns `o` if non-null, or throws `NullPointerException`.
`static <T> T`	`requireNonNull(T o, String message)`	Returns `o` if non-null, or throws `NullPointerException` with the given detail message.
`static String`	`toString(Object o)`	Returns "null" for null or `o.toString()`.
`static String`	`toString(Object o, String nullString)`	Returns `nullString` for null or `o.toString()`.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- compare
  
  public static <T> int compare(T a, T b, Comparator<? super T> c)
  
  Returns 0 if a == b, or c.compare(a, b) otherwise. That is, this makes c null-safe.
- deepEquals
  
  public static boolean deepEquals(Object a, Object b)
  
  Returns true if both arguments are null, the result of Arrays.equals(byte[], byte[]) if both arguments are primitive arrays, the result of Arrays.deepEquals(java.lang.Object[], java.lang.Object[]) if both arguments are arrays of reference types, and the result of equals(java.lang.Object, java.lang.Object) otherwise.
- equals
  
  public static boolean equals(Object a, Object b)
  
  Null-safe equivalent of a.equals(b).
- hash
  
  public static int hash(Object... values)
  
  Convenience wrapper for Arrays.hashCode(boolean[]), adding varargs. This can be used to compute a hash code for an object's fields as follows: Objects.hash(a, b, c).
- hashCode
  
  public static int hashCode(Object o)
  
  Returns 0 for null or o.hashCode().
- requireNonNull
  
  public static <T> T requireNonNull(T o)
  
  Returns o if non-null, or throws NullPointerException.
- requireNonNull
  
  public static <T> T requireNonNull(T o, String message)
  
  Returns o if non-null, or throws NullPointerException with the given detail message.
- toString
  
  public static String toString(Object o)
  
  Returns "null" for null or o.toString().
- toString
  
  public static String toString(Object o, String nullString)
  
  Returns nullString for null or o.toString().

Class Objects

Method Summary

Methods inherited from class java.lang.Object

Method Details