Currying in Java (and partial application of function example)

CurryingExample.java

import com.googlecode.totallylazy.Function1;

import java.util.Arrays;

import static java.lang.String.*;

public class CurryingExample {

    static abstract class Function1<A, B> extends com.googlecode.totallylazy.Function1<A, B> {
        @Override
        public String toString() {
            Class<?> function = getClass().getSuperclass();
            return format("%s<%s>", function.getSimpleName(), Arrays.toString(function.getTypeParameters()));
        }
    }

    public static int add(int a, int b, int c) {
        return a + b + c;
    }

    public static Function1<Integer, Function1<Integer, Integer>> add() {
        return new Function1<Integer, Function1<Integer, Integer>>() {
            @Override
            public Function1<Integer, Integer> call(final Integer first) throws Exception {
                return new Function1<Integer, Integer>() {
                    @Override
                    public Integer call(Integer second) throws Exception {
                        return first + second;
                    }
                };
            }
        };
    }

    public static void main(String... args) {
        System.out.println("add(1, 1, 1) = " + add(1, 1, 1));
        System.out.println("add().apply(1) = " + add().apply(1));
        System.out.println("add().apply(1).apply(1) = " + add().apply(1).apply(1));
    }
}

add(1, 1, 1) = 3
add().apply(1) = Function1<[A, B]>
add().apply(1).apply(1) = 2

add(1, 1, 1) = 3
add().apply(1) = Function1<[A, B]>
add().apply(1).apply(1) = 2

Scala

object CurryExample {

  //  def add(x: Int, y: Int): Int = {
  //    x + y
  //  }

  // shortcut
  def add(x: Int)(y: Int): Int = {
    x + y
  }

  def addLongHand(x: Int): (Int => Int) = {
    (y: Int) => {
      x + y
    }
//    return new Function[Int, Int] {
//      override def apply(y: Int) = x + y
//    }
  }

  def main(args: Array[String]) {
    //      println("add(1, 2) = " + add(1, 2))
    println("add(1) = " + add(1) _)
    println("add(1) = " + add(1) _)
    println("(add(1) _).apply(2) =" + (add(1) _).apply(2))
    println("add(1)(2) = " + add(1)(2))
    println("addLongHand(1)(2) = " + addLongHand(1).apply(2))
  }
}

Scala

object CurryExample {

  //  def add(x: Int, y: Int): Int = {
  //    x + y
  //  }

  // shortcut
  def add(x: Int)(y: Int): Int = {
    x + y
  }

  def addLongHand(x: Int): (Int => Int) = {
    (y: Int) => {
      x + y
    }
//    return new Function[Int, Int] {
//      override def apply(y: Int) = x + y
//    }
  }

  def main(args: Array[String]) {
    //      println("add(1, 2) = " + add(1, 2))
    println("add(1) = " + add(1) _)
    println("add(1) = " + add(1) _)
    println("(add(1) _).apply(2) =" + (add(1) _).apply(2))
    println("add(1)(2) = " + add(1)(2))
    println("addLongHand(1)(2) = " + addLongHand(1).apply(2))
  }
}