org.antlr.v4.runtime.misc

Interface EqualityComparator<T>

All Known Implementing Classes:

AbstractEqualityComparator, ObjectEqualityComparator, PredictionContext.IdentityEqualityComparator

public interface EqualityComparator<T>

This interface provides an abstract concept of object equality independent of Object.equals(java.lang.Object) (object equality) and the == operator (reference equality). It can be used to provide algorithm-specific unordered comparisons without requiring changes to the object itself.

Author:

Sam Harwell

Method Summary

Modifier and Type	Method and Description
boolean	equals(T a, T b) This method tests if two objects are equal.
int	hashCode(T obj) This method returns a hash code for the specified object.

Method Detail

hashCode

int hashCode(T obj)

This method returns a hash code for the specified object.

Parameters:

obj - The object.

Returns:

The hash code for obj.

equals

boolean equals(T a,
               T b)

This method tests if two objects are equal.

Parameters:

a - The first object to compare.

b - The second object to compare.

Returns:

true if a equals b, otherwise false.