package fri.util;
/**
* Object utility. Equality and hash code for objects that may be null.
@author Ritzberger Fritz
*/
public abstract class Equals
{
/**
* Returns false if objects are not equal or one of them is null and the other not.
*/
public static boolean equals(Object o1, Object o2) {
return o1 == o2 ? true : o1 == null || o2 == null ? false : o1.equals(o2);
} // null == null is true in Java
/**
* Returns zero for a null object, else the objects hash code.
*/
public static int hashCode(Object o) {
return o == null ? 0 : o.hashCode();
}
private Equals() {}
}
