final

we cannot reinitialized the final variable.
we initialized it at time of declaration.

if we reinitialized we will get compile time error.

Example 2- final E e1=new E();
                         e1=null;
give compile time error reinitialize

Example 3- final F f2=new F();
                  f2=f1;
compile time error

Example 4   final String s="abc";
                            s="xyz";
compile time error

Example 5- final int []x=new int[2];
x=null;
compile time error

Example 6-argument of method can also be final.

void test(int a,final int b);