int i = 3;
{
  print(i);  // java won't compile, C prints "3", JavaScript print "undefined"
  int i = 5;
  print(i);  // java won't compile, C prints "5", JavaScript print "5"
}
print(i)



class X {
  static int i = 0;

  main()
  {
    int j = 1;
    {
      print(i);
      int i = 5;  // local variable can hide static class variable
      int j = 10; // java local variable cannot hide local varible (but C++ can)
      print(i);
    }
  }
}


Class X {
  int x;  // instance variables
  int y;

  public X(int x, int y) // local variables hide instance variables
  {
     this.x = x;  // the this keyword "unhides" the instance variables
     this.y = y;
  }
}