Hello world program in Java

HelloWorld/hello_world.java

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+import java.util.Scanner;
+
+public class hello_world {
+  public static void main(String[] args) 
+  {
+    Scanner input = new Scanner (System.in);
+    //ask user for input
+    System.out.print("Enter your name: ");
+    String name = input.next();
+    //greet user
+    System.out.println("Hello "+name+"!");
+  }
+}
+
+//to run this program - in terminal we need to run the below commands:
+
+//javac hello_world.java
+//java hello_world