Overriding equals() of Object (Java)

Today I encoutered a problem to compare to user-defined instances for value equavelence.

It is necessary to override the equals() method derived from System.Object.

I tried to make it as simple as

public boolean equals(userDefinedClass p){  return this.v1==p.v1&&this.v2==p.v2;}

but it refuses to work.

After carefully explored the context, I found 2mistakes:

1.  "==" is used for reference compare, which is against my intention.

2. this function is not overriding the derived equals(), but a overload with different parameters.

So, this works

public boolean equals(Object q){  userDefinedClass p = (userDefinedClass)q;  return this.v1.equals(p.v1)&&this.v2.equals(p.v2);}