BAEL-4790_examples

core-java-modules/core-java-streams-3/src/main/java/com/baeldung/streams/streamvscollection/StreamVsCollectionExample.java

@@ -0,0 +1,49 @@
+package com.baeldung.streams.streamvscollection;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class StreamVsCollectionExample {
+    
+    static ArrayList<String> userNameSource = new ArrayList<>();
+    
+    static {
+        userNameSource.add("john");
+        userNameSource.add("smith");
+        userNameSource.add("tom");
+        userNameSource.add("rob");
+        userNameSource.add("charlie");
+        userNameSource.add("alfred"); 
+    }
+    
+    public static Stream<String> userNames() {
+        return userNameSource.stream();
+    }
+    
+    public static List<String> userNameList() {
+        return userNames().collect(Collectors.toList());
+    }
+
+    public static Stream<String> filterUserNames() {
+        return userNames().filter(i -> i.length() >= 4);
+    }
+    
+    public static Stream<String> sortUserNames() {
+        return userNames().sorted();
+    }
+    
+    public static Stream<String> limitUserNames() {
+        return userNames().limit(3);
+    }
+    
+    public static Stream<String> sortFilterLimitUserNames() {
+        return filterUserNames().sorted().limit(3);
+    }
+    
+    public static void printStream(Stream<String> stream) {
+        stream.forEach(System.out::println);
+    }
+    
+}