Final var

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

@@ -0,0 +1,30 @@
+package com.shadab.java.core.accessmodifiers;
+
+public class FinalVariable {
+
+	public static final int rank =20;
+	public static final Data data =new Data();
+
+}
+
+class FinalTest{
+
+	public static void main(String[] args) {
+		FinalVariable finalVariable = new FinalVariable();
+		// 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;
+		// 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);
+	}
+
+}
+
+class Data{
+	int id ;
+	String name;
+}