Added HelloWorld in Java

HelloWorld/hello_world.java

@@ -0,0 +1,17 @@
+// by Conny Heb -- https://github.com/ConnyHeb
+
+import java.util.Scanner;
+
+public class hello_world {
+
+    public static void main(String[] args) {
+
+        Scanner scan = new Scanner(System.in);
+        System.out.println("Enter your name: ");
+        String name = scan.next();
+        System.out.println("Hello " + name + "!");
+
+    }
+
+
+}