Create 18b. Add numbers to list 2

Week 3: Objects, files and exceptions/18b. Add numbers to list 2

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+Write a program that asks the user to enter integers. 
+The program adds the numbers entered by the user to the list in the order in which they were entered. 
+
+When the user enters -1, the program terminates and prints the list.
+
+If the user's input contains anything other than numbers, the program ignores the input.
+
+Example execution:
+Give a number: 2
+Give a number: 3
+Give a number: sdf
+Give a number: 4
+Give a number: 5
+Give a number: forty
+Give a number: -1
+[2, 3, 4, 5]
+
+
+
+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<Integer> list = new ArrayList<>();
+        // DONT RECREATE SCANNER EVERY ITERATION
+        Scanner reader = new Scanner(System.in);
+
+
+        while (true) {
+            
+            try {
+                System.out.print("Give a number: ");
+                int user_num = Integer.valueOf(reader.nextLine());
+    
+                // terminate if user enters '-1'
+                if (user_num == -1) {
+                    break;
+                }
+                else {
+                    list.add(user_num);
+                }
+        
+            
+            }
+            // ignore error and continue if user enters non-integer
+            catch (Exception e) {
+                continue;
+            }
+        }
+        System.out.println(list);
+            
+       
+
+        
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+Test number 1
+Give a number: 2
+Give a number: 3
+Give a number: 4
+Give a number: x
+Give a number: 5
+Give a number: -1
+[2, 3, 4, 5]
+
+Test number 2
+Give a number: six
+Give a number: 10
+Give a number: 12
+Give a number: asdads
+Give a number: 14
+Give a number: 16q
+Give a number: we
+Give a number: -1
+[10, 12, 14]
+
+Test number 3
+Give a number: 9
+Give a number: 9
+Give a number: nine
+Give a number: nine
+Give a number: 9
+Give a number: 9
+Give a number: 8
+Give a number: 7
+Give a number: too
+Give a number: 2
+Give a number: f2
+Give a number: -1
+[9, 9, 9, 9, 8, 7, 2]
+
+