Merge pull request #4326 from MherBaghinyan/BAEL-1799

Bael 1799

spring-core/src/main/java/com/baeldung/collection/BaeldungBean.java

@@ -0,0 +1,18 @@
+package com.baeldung.collection;
+
+/**
+ * Created by Gebruiker on 5/22/2018.
+ */
+public class BaeldungBean {
+
+    private String name;
+
+    public BaeldungBean(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}

spring-core/src/main/java/com/baeldung/collection/CollectionConfig.java

@@ -0,0 +1,50 @@
+package com.baeldung.collection;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.annotation.Order;
+
+import java.util.*;
+
+@Configuration
+public class CollectionConfig {
+
+    @Bean
+    public CollectionsBean getCollectionsBean() {
+        return new CollectionsBean(new HashSet<>(Arrays.asList("John", "Adam", "Harry")));
+    }
+
+    @Bean
+    public List<String> nameList(){
+        return Arrays.asList("John", "Adam", "Harry", null);
+    }
+
+    @Bean
+    public Map<Integer, String> nameMap(){
+        Map<Integer, String>  nameMap = new HashMap<>();
+        nameMap.put(1, "John");
+        nameMap.put(2, "Adam");
+        nameMap.put(3, "Harry");
+        return nameMap;
+    }
+
+    @Bean
+    @Qualifier("CollectionsBean")
+    @Order(2)
+    public BaeldungBean getElement() {
+        return new BaeldungBean("John");
+    }
+
+    @Bean
+    @Order(3)
+    public BaeldungBean getAnotherElement() {
+        return new BaeldungBean("Adam");
+    }
+
+    @Bean
+    @Order(1)
+    public BaeldungBean getOneMoreElement() {
+        return new BaeldungBean("Harry");
+    }
+}

spring-core/src/main/java/com/baeldung/collection/CollectionInjectionDemo.java

@@ -0,0 +1,20 @@
+package com.baeldung.collection;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+/**
+ * Created by Gebruiker on 5/18/2018.
+ */
+public class CollectionInjectionDemo {
+
+    public static void main(String[] args) {
+
+        ApplicationContext context = new AnnotationConfigApplicationContext(CollectionConfig.class);
+        CollectionsBean collectionsBean = context.getBean(CollectionsBean.class);
+        collectionsBean.printNameList();
+        collectionsBean.printNameSet();
+        collectionsBean.printNameMap();
+        collectionsBean.printBeanList();
+    }
+}

spring-core/src/main/java/com/baeldung/collection/CollectionsBean.java

@@ -0,0 +1,54 @@
+package com.baeldung.collection;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Created by Gebruiker on 5/18/2018.
+ */
+public class CollectionsBean {
+
+    @Autowired
+    private List<String> nameList;
+
+    private Set<String> nameSet;
+
+    private Map<Integer, String> nameMap;
+
+    @Autowired(required = false)
+    @Qualifier("CollectionsBean")
+    private List<BaeldungBean> beanList = new ArrayList<>();
+
+    public CollectionsBean() {
+    }
+
+    public CollectionsBean(Set<String> strings) {
+        this.nameSet = strings;
+    }
+
+    @Autowired
+    public void setNameMap(Map<Integer, String> nameMap) {
+        this.nameMap = nameMap;
+    }
+
+    public void printNameList() {
+        System.out.println(nameList);
+    }
+
+    public void printNameSet() {
+        System.out.println(nameSet);
+    }
+
+    public void printNameMap() {
+        System.out.println(nameMap);
+    }
+
+    public void printBeanList() {
+        System.out.println(beanList);
+    }
+}