From 85c4c1450b68d7dbcc0bdf95daa210d3341be137 Mon Sep 17 00:00:00 2001
From: Ulisses Lima <ulisseslima@users.noreply.github.com>
Date: Mon, 20 Nov 2023 19:43:54 -0300
Subject: [PATCH] BAEL-2499 - Write to CSV in Java

Closes #15250

Adding a null check.
---
 .../src/main/java/com/baeldung/csv/WriteCsvFileExample.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core-java-modules/core-java-io-conversions-2/src/main/java/com/baeldung/csv/WriteCsvFileExample.java b/core-java-modules/core-java-io-conversions-2/src/main/java/com/baeldung/csv/WriteCsvFileExample.java
index f409d05b06..184ae6d3e3 100644
--- a/core-java-modules/core-java-io-conversions-2/src/main/java/com/baeldung/csv/WriteCsvFileExample.java
+++ b/core-java-modules/core-java-io-conversions-2/src/main/java/com/baeldung/csv/WriteCsvFileExample.java
@@ -12,6 +12,10 @@ public class WriteCsvFileExample {
     }
 
     public String escapeSpecialCharacters(String data) {
+        if (data == null) {
+            throw new IllegalArgumentException("Input data cannot be null");
+        }
+        
         String escapedData = data.replaceAll("\\R", " ");
         if (data.contains(",") || data.contains("\"") || data.contains("'")) {
             data = data.replace("\"", "\"\"");