Java Certification 8 & 11 OCJA (1Z0 - 808 & 815)Compile time Polymorphism / Static Polymorphism

Java Certification 8 & 11 OCJA (1Z0 - 808 & 815)Session-56|Compile time
polymorphism/static polymorphism/early binding,Overriding Definition,Dynamic polymorphism/runtime polymorphism
/late binding,Dynamic method dispatch,Rules for Overding:Method signature must be same,return types must be matched
-covariant return types also allowed,Overridng is not applicable to the private methods,Overriding concept not applicable
for final methods.

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[AkashKumar-jlsw]

53:36 "Thoda Thoda Clarity Aa Gaya" no sir "Poora clarity aa gaya" Thank you for the wonderful explanation.

[soufieneouertani]

In case of "Parent PC = new Child();", whats the rule ?
Because in the example below, Once it is the child who is considered and then it is the parent !!!
Thanks for answering :)


class Parent {
void mP_1(){

}
}
class Child extends Parent {
void mP_1(){

}
}
public class Test_Pere_Fils_Refernce{
public void m1(Parent A){

}
public void m1(Child m){
System.out.println("Child");
}
public static void main(String[] args){
Parent PC = new Child(); // Reference Pere/Objet Enfant
Test_Pere_Fils_Refernce Obj_1 = new Test_Pere_Fils_Refernce();

// Why in the lines below, Once it is the child and then the parent ?


PC.mP_1(); // "mP_1_Child" => Here the result is the child !
Obj_1.m1(PC); // "Parent" => Here teh result is the Parent !

}
}