diff --git a/core-java-modules/core-java-optional/src/main/java/com/baeldung/optional/Person.java b/core-java-modules/core-java-optional/src/main/java/com/baeldung/optional/Person.java index 47473c29ea..f9fbc5dc3a 100644 --- a/core-java-modules/core-java-optional/src/main/java/com/baeldung/optional/Person.java +++ b/core-java-modules/core-java-optional/src/main/java/com/baeldung/optional/Person.java @@ -1,6 +1,8 @@ package com.baeldung.optional; +import java.util.List; import java.util.Optional; +import java.util.stream.Collectors; public class Person { private String name; @@ -21,7 +23,7 @@ public class Person { } public Optional getAge() { - return Optional.ofNullable(age); + return Optional.of(age); } public void setAge(int age) { @@ -36,4 +38,37 @@ public class Person { return Optional.ofNullable(password); } + public static List search(List people, String name, Optional age) { + // Null checks for people and name + return people.stream() + .filter(p -> p.getName().equals(name)) + .filter(p -> p.getAge().get() >= age.orElse(0)) + .collect(Collectors.toList()); + } + + public static List search(List people, String name, Integer age) { + // Null checks for people and name + final Integer ageFilter = age != null ? age : 0; + + return people.stream() + .filter(p -> p.getName().equals(name)) + .filter(p -> p.getAge().get() >= ageFilter) + .collect(Collectors.toList()); + } + + public static List search(List people, String name) { + return doSearch(people, name, 0); + } + + public static List search(List people, String name, int age) { + return doSearch(people, name, age); + } + + private static List doSearch(List people, String name, int age) { + // Null checks for people and name + return people.stream() + .filter(p -> p.getName().equals(name)) + .filter(p -> p.getAge().get().intValue() >= age) + .collect(Collectors.toList()); + } }