From 3840659063e268253f8a27b1a7b08ad07a855043 Mon Sep 17 00:00:00 2001
From: Tobias Herbert <tobias-manfred.herbert@informatik.hs-fulda.de>
Date: Wed, 7 Feb 2024 10:10:19 +0100
Subject: [PATCH] Added isNumber Method to Administration class

---
 src/main/java/org/example/Administration.java | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/main/java/org/example/Administration.java b/src/main/java/org/example/Administration.java
index 4e4c4f7..c9e5d90 100644
--- a/src/main/java/org/example/Administration.java
+++ b/src/main/java/org/example/Administration.java
@@ -208,6 +208,22 @@ public class Administration {
         }
     }
 
+    public boolean isNumber(String substring)
+    {
+        if(substring == null || substring.isEmpty())
+        {
+            return false;
+        }
+        for(char c : substring.toCharArray())
+        {
+            if(!Character.isDigit(c))
+            {
+                return false;
+            }
+        }
+        return true;
+    }
+
 }