generating numbers

javaplug · javaplug · commit cf053b1e04da · 2018-12-16T17:41:20.000+05:30
diff --git a/src/com/eight/pipeline/GenerateNumbers.java b/src/com/eight/pipeline/GenerateNumbers.java
@@ -0,0 +1,33 @@
+package com.eight.pipeline;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class GenerateNumbers {
+
+    public static void main(String[] args) {
+        //TODO generating numbers
+        List<String> nums = IntStream.rangeClosed(1, 9)
+                                     .mapToObj(String::valueOf)
+                                     .collect(Collectors.toList());
+        List<String> alphas = IntStream.rangeClosed('A', 'Z')
+                                       .mapToObj(i -> (char) i)
+                                       .map(String::valueOf)
+                                       .collect(Collectors.toList());
+        
+        System.out.println(nums);
+        System.out.println(alphas);
+        
+        System.out.println(
+        alphas.stream()
+              .flatMap(a -> nums.stream().map(n -> a + n))
+              .collect(Collectors.toList()));
+    }
+
+    public static boolean isPrime(int number) {
+        return IntStream.rangeClosed(2, number / 2)
+                        .noneMatch(iter -> number % iter == 0);
+    }
+
+}
