Hw To Make Inner Class Distinguish Func Parameter And Outer Class Var

Question

i fail to make an inner class distinguish among function parameter and outer class variable.
consider the following code:
public class a {
     int var; // i want to access this one using inner class.
     public a(int var) {
          this.var = var;
          class b {
               public void fun() {
                    var = 100;
i get an error a.java:9: local variable var is accessed from within inner class; needs to be declared final.
when i change the code to this:
public class a {
     int var; // i want to access this one using inner class.
     public a() {          
          class b {
               public void fun() {
                    var = 100;
it compiled no problem.it seems that inner class is accessing function parameter rather than outer class member.
is there any syntax i can use to make me access the outer class member variable whithout renaming or removing the function parameter?
thank you.

Answer 1

a.this.var = 100; //Use this in the inner class.Amazing syntax -:)