[Solved] What is wrong with the following code snippet?String s = "world"; s.substring(1) = "W"; — Ans: You cannot assign a value to the result of substring() because strings are... | Java

Java - Strings and String Handling

What is wrong with the following code snippet?

String s = "world";
s.substring(1) = "W";

Asubstring() method does not exist in String class

BYou cannot assign a value to the result of substring() because strings are immutable

CThe code correctly changes the substring of s

DYou need to use charAt() instead of substring() to assign a value

Step-by-Step Solution

Solution:

Step 1: Understand substring()
The substring() method returns a new String and does not allow assignment.
Step 2: Immutability of String
Strings in Java are immutable, so you cannot modify parts of them directly.
Final Answer:
You cannot assign a value to the result of substring() because strings are immutable -> Option B
Quick Check:
Assigning to substring() result is invalid [OK]

Quick Trick: Strings are immutable; substring() returns new string [OK]

Common Mistakes:

Master "Strings and String Handling" in Java

9 interactive learning modes - each teaches the same concept differently

More Java Quizzes

What is wrong with the following code snippet?