Create Reference _Variable_Casting.java

reference variable casting

Author: Akashtiwari123

Reference _Variable_Casting.java

@@ -0,0 +1,30 @@
+package main;
+/*
+@author:Akash Tiwari
+*/
+
+ class A{
+	
+}
+ class B extends A{
+	 
+ }
+public class consrtuct {
+
+	public static void main(String[] args) {
+		A a=new A();
+		B b=new B();
+	//	b=a;              //Type mismatch: cannot convert from A to B
+		
+		//But this can also be overcome by making the behaviour of A to be as B.
+		a=b;      //line20
+		b=(B)a;   //This will not cause any compilation error
+		  /*
+      The order of line 20 and 21 is importent as it first make
+      a polymorphic polymorphism is made so that the next line make itself as pure polymorphism
+      else it gives classCastException runtime error
+      */
+		System.out.println("Success");
+	}
+
+}