equals

Week 3: Objects, files and exceptions/[GRADING PROBLEM]2. Names to list - equals

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+Write a program that asks the user for names. 
+The given names are added to the list.
+
+However, if the name is already in the list, it is not added again, but an error message is printed to the user. 
+When the user enters 'quit', the list of names is printed and the program is terminated.
+
+Example execution:
+Give a name: Jack
+Hello, Jack
+Give a name: Jill
+Hello, Jill
+Give a name: Jack
+Name has already been given
+Give a name: Ann
+Hello, Ann
+Give a name: Jill
+Name has already been given
+Give a name: quit
+Names: [Jack, Jill, Ann]
+
+
+
+
+
+
+
+import java.util.Random;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        ArrayList<String> names = new ArrayList<String>();
+
+        while (true) {
+            Scanner reader= new Scanner(System.in);
+            System.out.print("Give a name: ");
+            String name = String.valueOf(reader.nextLine());
+
+            if (name.equals("quit")) {
+                break;
+            }
+
+            if (names.contains(name)) {
+                System.out.println("Name has already been given");
+            } 
+            else {
+                names.add(name);
+                System.out.println("Hello, " + name);
+            }
+        }
+        System.out.println("Names: " + names);
+        
+        
+    }
+}