Lamda Static Function Call Java
The Function interface is defined in java.util.function package and it has only one method apply with the following signature:
public R apply(T t){ }
It takes a generic class T and returns a generic class R. In this example you will how to create static Function which takes List of Integer and add all integer value then return it.
- FunctionStaticTest.java:
package com.javahonk.lamda;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Function;
public class FunctionStaticTest {
public static void main(String[] args) {
List<Integer> value = new ArrayList<>();
value.add(55);
value.add(55);
value.add(55);
Integer value2 = aggegatedQuantity.apply(value);
System.out.println("Calculated value: "+value2);
}
static Function<List<Integer>, Integer> aggegatedQuantity = t -> {
int aggregatedQuantity = 0;
for (Integer vak : t) {
aggregatedQuantity += vak;
}
return aggregatedQuantity;
};
}
- Output:
- For more information please visit Oracle documentation here
