Difference Between String Class And Stringbuffer Class In Java
differences between String and StringBuffer classes in Java
Difference Between String Class And Stringbuffer Class In Java
In Java, the main difference between the String class and StringBuffer class is that String objects are immutable, meaning they cannot be changed after they are created, while StringBuffer objects are mutable, allowing for dynamic changes to the character sequence. This means when you modify a String object, a new String object is created in memory each time, while with StringBuffer, the same object can be modified without generating a new object. Therefore, if you need to perform a large number of modifications on a string, using StringBuffer can be more efficient in terms of performance.
To Download Our Brochure: https://www.justacademy.co/download-brochure-for-free
Message us for more information: +91 9987184296
1 - Immutability:
String class in Java is immutable, which means once a string is created, it cannot be changed. Any operation on a String object creates a new string. This can be inefficient for operations that involve a lot of string manipulations.
StringBuffer class, on the other hand, is mutable. It allows modification of characters in the existing string without creating a new object each time, leading to better performance in scenarios where frequent modifications are needed.
2) Thread safety:
String objects are inherently thread safe because they are immutable and cannot be modified once created. Multiple threads can safely share and use the same string object simultaneously.
StringBuffer objects are mutable and hence not thread safe by default. However, StringBuffer has synchronized methods which ensure that operations on StringBuffer are thread safe.
3) Performance:
Due to immutability, String class might not be very efficient for concatenating multiple strings as it creates a new object each time a concatenation operation is performed.
StringBuffer is designed to support mutable strings efficiently, making it more suitable for situations where strings need to be modified frequently.
4) Flexibility:
String is suitable for scenarios where the content of the string does not change frequently, such as storing constants or literals.
StringBuffer is more appropriate for cases where the contents of the string need to be dynamically modified or built incrementally, such as constructing SQL queries or processing large amounts of text data.
5) API methods:
String class provides various utility methods for manipulating and comparing strings, as well as methods for searching and extracting substrings.
StringBuffer class offers methods for appending, inserting, replacing, and deleting characters within the string, along with the ability to reverse the sequence of characters.
6) Memory management:
String objects are stored in the string constant pool, which helps in saving memory as duplicate string literals are not stored separately.
StringBuffer objects are stored as regular objects in the heap memory, which may consume more memory compared to String objects but provide flexibility for modifications.
By understanding these differences, students can choose the appropriate class based on the requirements of their program to optimize performance and memory usage effectively.
Browse our course links : https://www.justacademy.co/all-courses
To Join our FREE DEMO Session: Click Here
Contact Us for more info:
- Message us on Whatsapp: +91 9987184296
- Email id: info@justacademy.co
Collections Java Interview Questions
Software Testing Course In Nagpur
Devops Interview Questions For Freshers
