Example Java 8 lambda expression: concatenation of two strings. The first version explicitly defines types and a method body. The second version omits these. It uses implicit typing for its parameters, and lacks the return statement.

LambdaConcat.java

java.util.function.BiFunction<String, String, String> concat1
	= (String s, String t) -> {
	  return s + t;
	};

java.util.function.BiFunction<String, String, String> concat2
	= (s, t) -> s + t;