overriding a variable in java

Question

public class Foo {
      public int a = 3;
    public void addFive(){
        a += 5; System.out.print(\"f \");
    }
}

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public class          


        

Answer 1

class Foo {
        public void addFive() { 
            a += 5; System.out.print("f "); 
        }
}

you don't have 'a' variable defined, so this example doesn't even compile.

correct code:

class Foo {

       public int a;

       public void addFive() { 
          a += 5; System.out.print("f "); 
       }
}

and see link https://stackoverflow.com/a/2464254/1025312