From dd9dcae1f4d043a94dbaa538f81824cf0ec7d800 Mon Sep 17 00:00:00 2001
From: Kai Yuan <kent.yuan@Gmail.com>
Date: Sun, 19 Dec 2021 01:56:28 +0100
Subject: [PATCH] add methods (#11579)

---
 .../baeldung/map/iteration/MapIteration.java  | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/core-java-modules/core-java-collections-maps-2/src/main/java/com/baeldung/map/iteration/MapIteration.java b/core-java-modules/core-java-collections-maps-2/src/main/java/com/baeldung/map/iteration/MapIteration.java
index b0c32e1487..2d8b17e5e7 100644
--- a/core-java-modules/core-java-collections-maps-2/src/main/java/com/baeldung/map/iteration/MapIteration.java
+++ b/core-java-modules/core-java-collections-maps-2/src/main/java/com/baeldung/map/iteration/MapIteration.java
@@ -17,22 +17,45 @@ public class MapIteration {
         System.out.println("Iterating Keys of Map Using KeySet");
         mapIteration.iterateKeys(map);
 
+        System.out.println("Iterating Values of Map Using values()");
+        mapIteration.iterateValues(map);
+
         System.out.println("Iterating Map Using Entry Set");
         mapIteration.iterateUsingEntrySet(map);
 
         System.out.println("Iterating Using Iterator and Map Entry");
         mapIteration.iterateUsingIteratorAndEntry(map);
 
+        System.out.println("Iterating Using Iterator and KeySet");
+        mapIteration.iterateUsingIteratorAndKeySet(map);
+
+        System.out.println("Iterating values Using Iterator and values()");
+        mapIteration.iterateUsingIteratorAndValues(map);
+
         System.out.println("Iterating Using KeySet and For Each");
         mapIteration.iterateUsingKeySetAndForeach(map);
 
         System.out.println("Iterating Map Using Lambda Expression");
         mapIteration.iterateUsingLambda(map);
 
+        System.out.println("Iterating Map By Keys Using Lambda Expression");
+        mapIteration.iterateByKeysUsingLambda(map);
+
+        System.out.println("Iterating values Using Lambda Expression");
+        mapIteration.iterateValuesUsingLambda(map);
+
         System.out.println("Iterating Using Stream API");
         mapIteration.iterateUsingStreamAPI(map);
     }
 
+    public void iterateUsingIteratorAndValues(Map<String, Integer> map) {
+        Iterator<Integer> iterator = map.values().iterator();
+        while (iterator.hasNext()) {
+            Integer value = iterator.next();
+            System.out.println("value :" + value);
+        }
+    }
+
     public void iterateUsingEntrySet(Map<String, Integer> map) {
         for (Map.Entry<String, Integer> entry : map.entrySet()) {
             System.out.println(entry.getKey() + ":" + entry.getValue());
@@ -43,6 +66,14 @@ public class MapIteration {
         map.forEach((k, v) -> System.out.println((k + ":" + v)));
     }
 
+    public void iterateByKeysUsingLambda(Map<String, Integer> map) {
+        map.keySet().forEach(k -> System.out.println((k + ":" + map.get(k))));
+    }
+
+    public void iterateValuesUsingLambda(Map<String, Integer> map) {
+        map.values().forEach(v -> System.out.println(("value: " + v)));
+    }
+
     public void iterateUsingIteratorAndEntry(Map<String, Integer> map) {
         Iterator<Map.Entry<String, Integer>> iterator = map.entrySet()
             .iterator();
@@ -52,6 +83,14 @@ public class MapIteration {
         }
     }
 
+    public void iterateUsingIteratorAndKeySet(Map<String, Integer> map) {
+        Iterator<String> iterator = map.keySet().iterator();
+        while (iterator.hasNext()) {
+            String key = iterator.next();
+            System.out.println(key + ":" + map.get(key));
+        }
+    }
+
     public void iterateUsingKeySetAndForeach(Map<String, Integer> map) {
         for (String key : map.keySet()) {
             System.out.println(key + ":" + map.get(key));
@@ -68,7 +107,12 @@ public class MapIteration {
         for (String key : map.keySet()) {
             System.out.println(key);
         }
+    }
 
+    public void iterateValues(Map<String, Integer> map) {
+        for (Integer value : map.values()) {
+            System.out.println(value);
+        }
     }
 
 }
\ No newline at end of file