class Scope {

         public int x;      // This is a public variable for the class 'Scope'

         public void main() {

                int x;      // We define a new variable 'x' which will hide
                int i;      // the previous defined 'x'.       
                int k;

                x = 3;      // Here 'x' refer to the method varaibale
                            // The second 'x' declared.              

                this.x = 2; // To access the class variable you need 
                            // to use the keyword 'this'.


                // Here's a block of code that is WRONG! There is already a
                // variable 'i' in the 'main()' method.                  

                for (int i=0; i<1; i++) {
                     A a = new A();
                     a.M1();
                }

                // Now lets declare a new variable 'j' in the method 'main()'.

                for (int j=0; j<1; j++) {
                     int j;     // WRONG! Variable 'j' already exists in this method.
                }
         }
     }