How to zip two collections in Java? (#2176)

* How to zip two collections in Java? How to zip two collections in Java? | http://jira.baeldung.com/browse/BAEL-780 * Updated pom to add jool dependency * Added Unit Tests of Zip Collections * Moved files to libraries folder * Fixed Compilation Error * Removed jool dependency as code has been moved to libraries * Removed jool property attribute
2017-07-09 01:50:49 +05:30
parent 57279a1b5c
commit 1957750382
4 changed files with 132 additions and 1 deletions
@@ -0,0 +1,40 @@
+package com.baeldung.zip;
+
+import com.google.common.collect.Streams;
+import org.jooq.lambda.Seq;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.IntStream;
+
+public class ZipCollectionExample {
+    static List<String> names = Arrays.asList("John", "Jane", "Jack", "Dennis");
+
+    static List<Integer> ages = Arrays.asList(24, 25, 27);
+
+    public static void main(String[] args) {
+        //      Using Streams API from Guava 21
+        Streams
+          .zip(names.stream(), ages.stream(), (name, age) -> name + ":" + age)
+          .forEach(System.out::println);
+
+        //        Using native Java 8 Int Stream
+        IntStream
+          .range(0, Math.min(names.size(), ages.size()))
+          .mapToObj(i -> names.get(i) + ":" + ages.get(i))
+          .forEach(System.out::println);
+
+        //      Using jOOL
+        Seq
+          .of("John", "Jane", "Dennis")
+          .zip(Seq.of(24, 25, 27));
+
+        Seq
+          .of("John", "Jane", "Dennis")
+          .zip(Seq.of(24, 25, 27), (x, y) -> x + ":" + y);
+
+        Seq
+          .of("a", "b", "c")
+          .zipWithIndex();
+    }
+}