Updated

src/com/shadab/java/core/accessmodifiers/FinalVariable.java

@@ -1,30 +1,102 @@
 package com.shadab.java.core.accessmodifiers;
 
 public class FinalVariable {
-	
-	public static final int rank =20;
-	public static final Data data =new Data();
+
+	public static final int rank = 20;
+	public static final Data data = new Data();
 
 }
 
-class FinalTest{
-	
+class FinalTest {
+
 	public static void main(String[] args) {
 		FinalVariable finalVariable = new FinalVariable();
-		// finalVariable.rank=30; //--> The final field FinalVariable.rank cannot be assigned
+		// finalVariable.rank=30; //--> The final field FinalVariable.rank cannot be
+		// assigned
 		System.out.println(finalVariable.rank);
-		//FinalVariable.data= new Data(); //--> Final variable cant be rebound to another refrence
-		System.out.println("id:"+FinalVariable.data.id+"name:"+FinalVariable.data.name);
-		Data data =FinalVariable.data;
+		// FinalVariable.data= new Data(); //--> Final variable cant be rebound to
+		// another refrence
+		System.out.println("id:" + FinalVariable.data.id + "name:" + FinalVariable.data.name);
+		Data data = FinalVariable.data;
 		// but internal of the object refenrenced by final variable can be modified
-		data.id=23;
-		data.name="Rohan";
-		System.out.println("id:"+FinalVariable.data.id+"name:"+FinalVariable.data.name);
+		data.id = 23;
+		data.name = "Rohan";
+		System.out.println("id:" + FinalVariable.data.id + "name:" + FinalVariable.data.name);
+
+		System.out.println("***********************************");
+		doSomething(20);
+		doSomethingWithObject(data);
+
+
+		  Data data2 = new Data (2,"Ramesh");
+	//	data2=null; //--> cant be done
+		System.out.println(data2.id);
+		System.out.println(data2.name);
+		doSomethingWithNonFinalParam(data2);
+		System.out.println("doSomethingWithNonFinalParam");
+		System.out.println(data2.id);
+		System.out.println(data2.name);
+
+
+
+		doSomethingWithChnageRef(data2);
+
+		System.out.println(data2.id);
+		System.out.println(data2.name);
+	}
+
+	public static void doSomething(final int anyNumber) {
+		System.out.println(anyNumber);
+		// anyNumber=30; // --> Cant re assign
+
+	}
+
+	// normal object passed in a final paramater
+	public static void doSomethingWithObject(final Data data) {
+		System.out.println(data.id);
+		System.out.println(data.name);
+		// data=null; //-->The final local variable data cannot be assigned. It must be
+		// blank and not using a compound assignment
+
 	}
 
+	// normal object passed in a final paramater
+		public static void doSomethingWithNonFinalParam(Data data) {
+			data=new Data(419,"Jenky");
+			System.out.println(data.id);
+			System.out.println(data.name);
+			// data=null; //-->The final local variable data cannot be assigned. It must be
+			// blank and not using a compound assignment
+
+		}
+
+		// normal object passed in a final paramater
+		public static void doSomethingWithChnageRef(Data data) {
+ 			System.out.println(data.id);
+			System.out.println(data.name);
+			data=new Data(420,"Junky");
+			System.out.println(data.id);
+			System.out.println(data.name);
+
+
+		}
+
+
+
 }
 
-class Data{
-	int id ;
+
+
+class Data {
+	int id;
 	String name;
+
+	public Data(int id, String name) {
+		this.id=id;
+		this.name=name;
+	}
+
+	public Data() {
+		// TODO Auto-generated constructor stub
+	}
 }