import  java.util.function.Function;

public class MyClass {
    
  private static Function<Integer,Integer> outside(Integer y) {
    return new Function<Integer, Integer>() {
      @Override
      public Integer apply(Integer x) {
        return x + y;
      }
    };
  }

  private static Function<Integer,Integer> outside_lambda(Integer y) {
    return (x) -> (y + x);
  }
    
  public static void main(String args[]) {
        int x=10;
        int y=25;
        Function<Integer,Integer> inner_fn = outside(new Integer(y));
        int z = inner_fn.apply(x).intValue();

        System.out.println("Sum of x+y = " + z);
    }
}