add IntStream samples

Author: winterbe

src/com/winterbe/java8/Streams4.java

@@ -0,0 +1,37 @@
+packagecom.winterbe.java8;
+
+importjava.util.OptionalInt;
+importjava.util.stream.IntStream;
+
+/**
+ * @author Benjamin Winterberg
+ */
+publicclassStreams4{
+
+publicstaticvoidmain(String[] args){
+for (inti = 0; i < 10; i++){
+if (i % 2 == 1){
+System.out.println(i);
+ }
+ }
+
+IntStream.range(0, 10)
+ .forEach(i ->{
+if (i % 2 == 1) System.out.println(i);
+ });
+
+IntStream.range(0, 10)
+ .filter(i -> i % 2 == 1)
+ .forEach(System.out::println);
+
+OptionalIntreduced1 =
+IntStream.range(0, 10)
+ .reduce((a, b) -> a + b);
+System.out.println(reduced1.getAsInt());
+
+intreduced2 =
+IntStream.range(0, 10)
+ .reduce(7, (a, b) -> a + b);
+System.out.println(reduced2);
+ }
+}