How can we have 2 parameters in java.util.function.Function lambda?

Question

We can create lambda functions like this:

Function<Integer, String> getLambda = (a) -> new String("given value is "a);

I have a scenario where I need to take 2 values in a parameter. How can I accomplish that using Function?

Example:

getLamda(10,20); // I know this line will give error. How can I acheive this?

Tunaki · Accepted Answer · 2015-09-10 14:08:17Z

41

This is done using a BiFunction<T,U,R>. Following is an example of a BiFunction returning the character at the specified index of a String:

BiFunction<String, Integer, Character> charAtFunction = (string, index) -> string.charAt(index);

answered Sep 10, 2015 at 14:08

Tunaki

138k46 gold badges370 silver badges443 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

dotvav · Accepted Answer · 2015-09-10 14:08:24Z

9

Try :

BiFunction<Integer, Integer, String> lambda = (a, b) -> ("Given values are " + a + ", " + b);

answered Sep 10, 2015 at 14:08

dotvav

2,84818 silver badges31 bronze badges