Class Objects

java.lang.Object
java.util.Objects
public final class Objects extends java.lang.Object

This is a compatibility class which supports the java.util.Objects API. On platforms that don't support this class (e.g. Android) the build server will automatically remap all uses of java.util.Objects to use this implementation instead.

This class consists of static utility methods for operating on objects. These utilities include null-safe or null-tolerant methods for computing the hash code of an object, returning a string for an object, and comparing two objects.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Objects()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static <T> int
    compare(T a, T b, Comparator<? super T> c)
     
    static boolean
    deepEquals(java.lang.Object a, java.lang.Object b)
     
    static boolean
    equals(java.lang.Object a, java.lang.Object b)
    Returns true if the arguments are equal to each other and false otherwise.
    static int
    hash(java.lang.Object... values)
     
    static int
    hashCode(java.lang.Object o)
    Returns the hash code of a non-null argument and 0 for a null argument.
    static boolean
    nonNull(java.lang.Object obj)
     
    static <T> T
    requireNonNull(T obj)
     
    static <T> T
    requireNonNull(T obj, String message)
     
    static String
    toString(java.lang.Object o)
     
    static String
    toString(java.lang.Object o, String nullDefault)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Objects

      public Objects()

  • Method Details

    • equals

      public static boolean equals(java.lang.Object a, java.lang.Object b)

      Returns true if the arguments are equal to each other and false otherwise. Consequently, if both arguments are null, true is returned and if exactly one argument is null, false is returned. Otherwise, equality is determined by using the equals method of the first argument.

      Parameters

      • a

      • b

    • hashCode

      public static int hashCode(java.lang.Object o)

      Returns the hash code of a non-null argument and 0 for a null argument.

      Parameters
      • o

    • toString

      public static String toString(java.lang.Object o)

    • toString

      public static String toString(java.lang.Object o, String nullDefault)

    • compare

      public static <T> int compare(T a, T b, Comparator<? super T> c)

    • requireNonNull

      public static <T> T requireNonNull(T obj)

    • requireNonNull

      public static <T> T requireNonNull(T obj, String message)

    • nonNull

      public static boolean nonNull(java.lang.Object obj)

    • deepEquals

      public static boolean deepEquals(java.lang.Object a, java.lang.Object b)

    • hash

      public static int hash(java.lang.Object... values)