Class Objects

java.lang.Object
com.codename1.compat.java.util.Objects
public final class Objects extends 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.

  • Method Summary

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

    Methods inherited from class Object

    clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
     
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    final Class
    getClass()
    Returns the runtime class of an object.
    int
    hashCode()
    Returns a hash code value for the object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes current thread to wait until another thread invokes the method or the method for this object.
    final void
    wait(long timeout)
    Causes current thread to wait until either another thread invokes the method or the method for this object, or a specified amount of time has elapsed.
    final void
    wait(long timeout, int nanos)
    Causes current thread to wait until another thread invokes the method or the method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.

  • Method Details

    • equals

      public static boolean equals(Object a, 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(Object o)

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

      Parameters
      • o

    • toString

      public static String toString(Object o)

    • toString

      public static String toString(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(Object obj)

    • deepEquals

      public static boolean deepEquals(Object a, Object b)

    • hash

      public static int hash(Object... values)