Merge pull request #5 from modinilesh/NumericStreams

modinilesh · web-flow · commit 05eec56ad2bb · 2024-07-25T01:19:13.000+05:30
Numeric streams
diff --git a/src/factorymethods/OfGenerateIterateExample.java b/src/factorymethods/OfGenerateIterateExample.java
@@ -0,0 +1,30 @@
+package factorymethods;
+
+import java.util.Random;
+import java.util.stream.Stream;
+
+public class OfGenerateIterateExample {
+
+    public static void main(String[] args) {
+
+        //of() -> used to create a stream
+        Stream<Object> integerStream = Stream.of(1, 2, 3, 4, 5, 6, 7, "Nilesh");
+        integerStream.forEach(System.out::println);
+
+        //iterate() -> used to iterate stream infinitely
+        Stream<Integer> iterateInteger = Stream.iterate(1, x -> x * 2);
+//        iterateInteger.forEach(i -> System.out.println(i));
+
+        //iterate() -> used to iterate stream infinitely
+        Stream<Integer> iterateInteger1 = Stream.iterate(1, x -> x * 2)
+                .limit(10);
+        iterateInteger1.forEach(System.out::println);
+
+        //generate( Supplier<>)
+        Stream<Random> generate = Stream.generate(Random::new)
+                .limit(5);
+        generate.forEach(random -> System.out.println(random.nextInt()));
+
+
+    }
+}
diff --git a/src/numericstreams/RangeExample.java b/src/numericstreams/RangeExample.java
@@ -0,0 +1,28 @@
+package numericstreams;
+
+import java.util.stream.IntStream;
+
+public class RangeExample {
+
+    public static void main(String[] args) {
+
+        //range(a, b) -> b is not included
+        IntStream.range(1, 50)
+                .forEach(i -> System.out.print(i + ", "));
+        System.out.println();
+        System.out.println("The count of elements in range is : " + IntStream.range(1, 50).count());
+
+        //rangeClosed(a, b) -> b is included
+        IntStream.rangeClosed(1, 50)
+                .forEach(i -> System.out.print(i + ", "));
+        System.out.println();
+        System.out.println("The count of elements in rangeClosed is : " + IntStream.rangeClosed(1, 50).count());
+
+        //if we want to create double stream for a range then
+        IntStream.rangeClosed(1, 50)
+                .asDoubleStream()
+                .forEach(i -> System.out.print(i + ", "));
+
+
+    }
+}
