Set and HashSet

Author: raheemadamboev

out/production/java-data-structures/TheLinkedList.class

@@ -0,0 +1,35 @@
+import data.PersonModel;
+
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+
+public class TheSet {
+
+    public static void main(String[] args) {
+        Set<PersonModel> people = new HashSet<>();
+
+        people.add(new PersonModel("Dua Lipa", 28));
+        people.add(new PersonModel("Selena Gomez", 25));
+        people.add(new PersonModel("Justin Bieber", 18));
+        people.add(new PersonModel("Selena Gomez", 25));
+        //people.remove(new PersonModel("Justin Bieber", 18));
+
+        System.out.println(people.size());
+
+        people.forEach(System.out::println);
+
+        System.out.println();
+
+        Iterator<PersonModel> iterator = people.iterator();
+        while (iterator.hasNext()) {
+            System.out.println(iterator.next());
+        }
+
+        System.out.println();
+
+        for (PersonModel person : people) {
+            System.out.println(person);
+        }
+    }
+}

out/production/java-data-structures/TheQueue$Person.class

@@ -1,5 +1,7 @@
 package data;
 
+import java.util.Objects;
+
 public class PersonModel {
     private final String name;
     private final int age;
@@ -9,12 +11,17 @@ public PersonModel(String name, int age) {
         this.age = age;
     }
 
-    public String getName() {
-        return name;
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        PersonModel that = (PersonModel) o;
+        return age == that.age && Objects.equals(name, that.name);
     }
 
-    public int getAge() {
-        return age;
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, age);
     }
 
     @Override