Lambda Function Parameter Example
As previous examples you saw how to Lambda which is introduced with Java 8. In this example you will see how to pass Function as parameter and retrieve it value:
- LambdaFunctionParameter.java:
package com.javahonk;
import java.util.function.Function;
public class LambdaFunctionParameter {
public static void main(String[] args) {
//Call method which take Function as parameter
Integer personAge = getAge(e->e.getAge());
System.out.println("Age: "+personAge);
}
/**
* Takes Function as parameter
* @param age
* @return Integer age
*/
private static Integer getAge(Function<People, Integer> age){
People people = new People("Java", "Honk", 25);
return age.apply(people);
}
}
class People {
private String firstName;
private String lastName;
private Integer age;
public People(String firstName, String lastName, Integer age) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public Integer getAge() {
return age;
}
@Override
public String toString() {
return "Person [firstName=" + firstName + ", lastName=" + lastName
+ ", age=" + age + "]";
}
}- Output:
- For more details please visit Oracle documentation here
