diff --git a/Java/Ch 01. Arrays and Strings/Q1_02_Check_Permutation/QuestionA.java b/Java/Ch 01. Arrays and Strings/Q1_02_Check_Permutation/QuestionA.java
index 22cb6e27..2ef20ad2 100644
--- a/Java/Ch 01. Arrays and Strings/Q1_02_Check_Permutation/QuestionA.java	
+++ b/Java/Ch 01. Arrays and Strings/Q1_02_Check_Permutation/QuestionA.java	
@@ -8,6 +8,10 @@ public static String sort(String s) {
 	}
 	
 	public static boolean permutation(String s, String t) {
+		if(s.length() != t.length())
+		{
+			return false;
+		}
 		return sort(s).equals(sort(t));
 	}