How do you compare objects?
Comparing objects with equals()
If the two objects have the same values, equals() will return true . In the second comparison, equals() checks to see whether the passed object is null, or if it’s typed as a different class. If it’s a different class then the objects are not equal.
How do you compare characters?
The compare(char x, char y) method of Character class is used to compare two char values numerically. The final value returned is similar to what would be returned by: Character. valueoOf(x).
- a value 0 if x==y.
- a value less than 0 if x<y.
- a value greater than 0 if x>y.
Can two objects have same hashCode?
It is perfectly legal for two objects to have the same hashcode. If two objects are equal (using the equals() method) then they have the same hashcode. If two objects are not equal then they cannot have the same hashcode.
What is the hashCode () and equals () used for?
1. Usage of hashCode() and equals() Methods. equals(Object otherObject) – As method name suggests, is used to simply verify the equality of two objects. It’s default implementation simply check the object references of two objects to verify their equality.
What is hashCode () in Java?
Java Object hashCode() is a native method and returns the integer hash code value of the object. The general contract of hashCode() method is: Multiple invocations of hashCode() should return the same integer value, unless the object property is modified that is being used in the equals() method.
What does === mean?
1 x === y. The triple equals operator ( === ) returns true if both operands are of the same type and contain the same value. If comparing different types for equality, the result is false. This definition of equality is enough for most use cases.
What are the 3 logical operators?