Package com.google.common.base

Class Objects

  • @GwtCompatible
public final class Objects
extends
    Helper functions that can operate on any Object.

    See the Guava User Guide on .

    Since:
    2.0
    Author:
    Laurence Gonsalves

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean  a,  b)
      Determines whether two possibly-null objects are equal.
      static int ... objects)
      Generates a hash code for multiple values.

      • Methods inherited from class java.lang.

        , , , , , , , , , ,

    • Method Detail

      • equal

        public static boolean   a,
                              b)
        Determines whether two possibly-null objects are equal. Returns:
        • true if a and b are both null.
        • true if a and b are both non-null and they are equal according to .
        • false in all other situations.

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

        Note for Java 7 and later: This method should be treated as deprecated; use instead.

      • hashCode

        public static int    ... objects)
        Generates a hash code for multiple values. The hash code is generated by calling . Note that array arguments to this method, with the exception of a single Object array, do not get any special handling; their hash codes are based on identity and not contents.

        This is useful for implementing . For example, in an object that has three properties, x, y, and z, one could write: 

        
 public int hashCode() {
   return Objects.hashCode(getX(), getY(), getZ());
 }

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

        Note for Java 7 and later: This method should be treated as deprecated; use instead.