java-programming/javaUpdates/src/oops/ClassB.java at master · 9146887137/java-programming · GitHub

42 lines (37 loc) · 1.5 KB

package oops;

public class ClassB implements InterfaceA{

static{

System.out.println("static block");

* this is static block which get execute at the time of class loading process*/

}

{

System.out.println("non static block");

//this is non static block which get execute at the time of object loading process

//at the loading time it execute all the initializers first its also non static initializers

//this is an instance block which help me to create instance

System.out.println(this);

}

public ClassB() {

System.out.println("constructor");

// TODO Auto-generated constructor stub

* the work of constructor is load all the non static variables or non static method inside object memory

* new keyword create block of memory inside heap area after that constructor get called.

* first frame created of constructor inside stack area after that it load all the members of object

* constructor is one member of class but we cant call it explicitly it call automatically when we try to create instance of object

* we use constructor along with only new keyword

* every non static member contains its object reference thats why we can use any non-static member inside any non static member*/

}

public static void sta() {

System.out.println("static method");

}

public void sub(){

System.out.println("override inside class B");

}

public void add() {

System.out.println("add from class B");

sub();

//InterfaceA.super.add();

}

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