Tutorial Playlist
191 Lessons1. Introduction to Java
2. What is Java?
3. History of Java
4. Java Tutorial for Beginners
5. How Do Java Programs Work?
6. JDK in Java
7. C++ Vs Java
8. Java vs. Python
9. Java vs. JavaScript
10. From Java Source Code to Executable
11. How to Install Java in Linux
12. How to Install Java in Windows 10
13. Java Hello World Program
14. Structure of Java Program and Java Syntax
15. Operators in Java
16. Java If-else
17. Switch Case In Java
18. Loops in Java
19. Infinite loop in Java
20. For Loop in Java
21. For Each Loop in Java
22. Constructor in Java
23. Constructor Overloading in Java
24. Copy Constructor in Java
25. Default Constructor in Java
26. Parameterized Constructors in Java
27. Constructor Chaining In Java
28. Finalize Method in Java
29. Static Method in Java
30. Equals Method in Java
31. Abstract Method in Java
32. toString() Method in Java
33. Difference between equals method in Java
34. Inheritance in Java
35. Multiple Inheritance in Java
36. Hierarchical Inheritance in Java
37. Java Classes and Objects
38. Scanner Class in java
39. All classes in java are inherited from which class
40. What is Nested Class in Java
41. POJO Class in Java
42. Anonymous Class in Java
43. Final Class in Java
44. Object Class in Java
45. Packages in Java
46. Access Modifiers in Java
47. Static Keyword In Java
48. Final Keyword in Java
49. Checked and Unchecked Exceptions in Java
50. User Defined Exception in Java
51. Error vs. Exception in Java
52. Java Collection
53. Collections in Java
54. Garbage Collection in Java
55. Generics In Java
56. Java Interfaces
57. Functional Interface in Java
58. Marker Interface in Java
59. Streams in Java
60. Byte stream in java
61. File Handling in Java
62. Thread in Java
63. Thread Lifecycle In Java
64. Daemon Thread in Java
65. Thread Priority in Java
66. Deadlock in Java
67. String Pool in Java
68. Java Database Connectivity(JDBC)
69. Design Patterns in Java
70. Functional Programming in Java
71. OOP vs Functional vs Procedural
72. Heap Memory and Stack Memory in Java
73. Applet in Java
74. Java Swing
75. Java Frameworks
76. Hibernate Framework
77. JUnit Testing
78. How to Install Eclipse IDE for Java?
79. Command line arguments in Java
80. Jar file in Java
81. Java Clean Code
82. OOPs Concepts in Java
83. Java OOPs Concepts
84. Overloading vs Overriding in Java
85. Java 8 features
86. String in Java
87. String to int in Java
88. Why String Is Immutable in Java?
89. Primitive Data Types in Java
90. Non-Primitive Data Types in Java
91. This and Super Keyword in Java
92. HashMap in Java
93. Comparable And Comparator in Java
94. Type Casting in Java
95. Arrays Sort in Java with Examples
96. Variable Hiding and Variable Shadowing in Java
97. Enum in Java
98. Substring in Java
99. Pattern Programs in Java
100. Hashcode in Java
101. What is ByteCode in Java?
102. How To Take Input From User in Java
103. GCD of Two Numbers in Java
104. Linked List in Java
105. Arithmetic Operators in Java
106. Conditional Operators in Java
107. Stack and Queue in Java
108. Array Length in Java
109. Number Pattern Program in Java
110. Split in java
111. Map In Java
112. Difference Between Throw and Throws in Java
113. Difference Between Data Hiding and Abstraction
114. HashSet in Java
115. String Length in Java
116. Factorial Using Recursion in Java
117. DateFormat in Java
118. StringBuilder Class in java
119. Instance variables in Java
120. Java List Size
121. Java APIs
122. Reverse an Array in Java
123. StringBuffer and StringBuilder Difference in Java
Now Reading
124. Java Program to Add Two Numbers
125. String to Array in Java
126. Regular Expressions in Java
127. Identifiers in Java
128. Data Structures in Java
129. Set in Java
130. Pass By Value and Call By Reference in Java
131. Try Catch in Java
132. Bubble Sort in Java
133. Caesar Cipher Program in Java
134. Queue in Java
135. Object Creation in Java
136. Multidimensional Array in Java
137. How to Read a File in Java
138. String Comparison in Java
139. Volatile Keyword in Java
140. Control Statements in Java
141. Jagged Array in Java
142. Two-Dimensional Array in Java
143. Java String Format
144. Replace in Java
145. charAt() in Java
146. CompareTo in Java
147. Matrix Multiplication in Java
148. Static Variable in Java
149. Event Handling in Java
150. parseInt in Java
151. Java ArrayList forEach
152. Abstraction in Java
153. String Input in Java
154. Logical Operators in Java
155. instanceof in Java
156. Math Floor in Java
157. Selection Sort Java
158. int to char in Java
159. Stringtokenizer in java
160. Implementing and Manipulating Abs in Java
161. Char array to string in java
162. Convert Double To String In Java
163. Deque in Java
164. Converting a List to an Array in Java
165. The Max function in java
166. Removing whitespace from string in java
167. String arrays in Java
168. Strings in Java Vs Strings in Cpp
169. Sum of digits of a number in Java
170. Art of Graphical User Interfaces
171. Trim in Java
172. RxJava
173. Recursion in Java
174. HashSet Java
175. Difference Between Java and Python
176. Square Root in Java
177. Reverse A String in Java
178. Even Odd Program in Java
179. Fibonacci Series in Java
180. Prime Number Program in Java
181. Java Program to Print Prime Numbers in a Given Range
182. Java Leap Year Program
183. Swapping of Two Numbers in Java
184. LCM of Two Numbers in Java
185. Math.sqrt() Function in Java
186. Area of Triangle in Java
187. Sort a String In Java
188. Factorial Program in Java
189. Javafx
190. Lambda expression in java
191. Setup Java Home and IDE on macOS
Having a thorough familiarity with Java's string manipulation options is crucial. The StringBuffer and StringBuilder classes are particularly useful for working with strings. While there is some functional overlap between these categories, it is essential to understand the key differences.
In this in-depth post, we'll explore what sets StringBuffer and StringBuilder apart from one another when it comes to manipulating strings in Java. You'll be able to make well-informed judgments on how to handle strings in your Java projects once you've gained a thorough understanding of these classes by investigating their individual properties, use cases, and performance considerations.
In this post, we'll dissect StringBuffer and StringBuilder to see how they work, what advantages and disadvantages each has, and how they may be put to use in the real world. No topic related to these important classes for manipulating strings will be left uncovered, from their fundamental differences in thread-safety to the performance consequences in varied contexts.
Come along as we explore Java's StringBuffer and StringBuilder in-depth and learn their inner workings. By the time you're done reading, you'll have all the information you need to make educated decisions when dealing with strings in Java applications and make the most of the powerful tools at your disposal.
StringBuffer is a class in Java that provides mutable sequences of characters. It is part of the java.lang package and offers a variety of methods to modify and manipulate strings. Unlike the regular String class, StringBuffer allows for in-place modifications, making it more efficient when performing frequent string manipulations.
StringBuffer Example:
Output: "Hello World!"
In the above example, we create a StringBuffer object named `sb` with the initial value "Hello." We then use the `append()` method to concatenate the string "World!" to the existing value. Finally, we convert the StringBuffer to a regular String using the `toString()` method and print the result, which is "Hello World!".
StringBuilder is another class in Java, also part of the java.lang package, that provides mutable sequences of characters. It shares many similarities with StringBuffer but differs in its thread-safety behavior. Unlike StringBuffer, StringBuilder is not synchronized, which means it is not thread-safe. However, this lack of synchronization makes StringBuilder more efficient in single-threaded environments.
StringBuilder Example:
Output: "Hello World!"
In the above example, we use StringBuilder in a similar way as StringBuffer. We create a StringBuilder object named `sb` with the initial value "Hello," use the `append()` method to concatenate " World!" to the existing value, and then convert it to a regular String and print the result.
If you need to convert a StringBuffer object to a StringBuilder object, you can do so by creating a new StringBuilder object and passing the StringBuffer's content as a parameter to its constructor.
StringBuffer stringBuffer = new StringBuffer("Hello");
StringBuilder stringBuilder = new StringBuilder(stringBuffer.toString());
Conversely, if you have a StringBuilder object and need to convert it to a StringBuffer object, you can create a new StringBuffer object and pass the StringBuilder's content as a parameter to its constructor.
StringBuilder stringBuilder = new StringBuilder("Hello");
StringBuffer stringBuffer = new StringBuffer(stringBuilder.toString());
The following table encapsulates the key differences between StringBuilder and StringBuffer in Java:
Aspect | StringBuilder | StringBuffer |
Thread-safety | Not synchornized | Synchronized |
Performance | More efficient in single-threaded env. | Slower in multi-threaded env. |
Memory allocation | No extra memory allocation | Extra memory allocation for synchronization |
Usage | Suitable for single-threaded scenarios | Suitable for multi-threaded scenarios |
Concurrency | Not safe for concurrent access | Safe for concurrent access |
StringBuilder to StringBUffer conversion | Can be converted using constructor with StringBuilder's content as a parameter | Can be converted using constructor with StringBuffer's content as a parameter |
One crucial distinction between String and StringBuilder in Java is immutability. In Java, a String object is immutable, meaning its value cannot be changed once created. Any operation that appears to modify a String actually creates a new String object with the updated value. This immutability ensures that strings are thread-safe and can be safely shared among multiple threads. However, frequent modifications to strings using the String class can result in unnecessary object creation, impacting performance.
It's important to note that while StringBuilder and StringBuffer both provide mutable string manipulation, StringBuffer is synchronized and thread-safe, making it suitable for multi-threaded environments. StringBuilder, on the other hand, is not synchronized, making it more efficient in single-threaded scenarios.
Java's StringBuffer class offers a variety of methods for manipulating strings. These methods make it possible to modify string content effectively, making StringBuffer a flexible tool for manipulating strings. Here are a few typical approaches:
1. `append(String str)`: Appends the specified string to the end of the existing string.
2. `insert(int offset, String str)`: Inserts the specified string at the given offset in the existing string.
3. `delete(int start, int end)`: Removes the characters from the string starting at the 'start' index to the 'end' index.
4. `reverse()`: Reverses the characters in the string.
5. `replace(int start, int end, String str)`: Replaces the characters in the string from the 'start' index to the 'end' index with the specified string.
6. `substring(int start)`: Returns a new string that is a substring of the existing string, starting from the specified index.
7. `substring(int start, int end)`: Returns a new string that is a substring of the existing string, starting from the 'start' index and ending at the 'end' index.
These methods, as well as those offered by the StringBuffer class, allow flexibility and simplicity when changing strings in Java. You can efficiently perform numerous string manipulation operations to fulfill your individual requirements by leveraging these capabilities.
1. Logging System: When developing a logging system, it is important to use StringBuffer so that log messages from many threads can be appended in a secure manner. This eliminates the possibility of any concurrency problems occurring when the log messages are being written, as they will be written in the order in which they were received.
2. Text Editing Application: In a text editing application, StringBuilder offers a solution that is more effective in terms of managing user interactions and alterations to the text content.
3. Concurrent Web Application: - StringBuffer is an excellent option for use in concurrent web applications since it can manage several client requests at the same time.
4. String Concatenation in a Performance-Critical Application: Consider the following:
These additional reasons further emphasize the practical ramifications of choosing between StringBuffer and StringBuilder in real-world applications, taking into account thread-safety and performance considerations as well as the particular requirements of the application or system.
In conclusion, StringBuffer and StringBuilder are classes in Java that provide mutable sequences of characters. The main difference between them is their thread-safety behavior and performance characteristics. StringBuffer is synchronized and suitable for multi-threaded environments, while StringBuilder is not synchronized and more efficient in single-threaded scenarios. Both classes offer similar methods for string manipulation, allowing you to modify strings easily.
1. What is the most evident difference between String and StringBuffer?
The main difference is that String is immutable, meaning its value cannot be changed once it is created. On the other hand, StringBuffer is mutable, allowing for in-place modifications.
2. Is StringBuilder less efficient than StringBuffer?
StringBuilder is considered less efficient than StringBuffer in multi-threaded environments due to its lack of synchronization. However, in single-threaded scenarios, StringBuilder is generally more efficient.
3. Which class should I use, StringBuffer or StringBuilder?
If you are working in a multi-threaded environment where thread-safety is a concern, you should use StringBuffer. If you are working in a single-threaded environment and performance is critical, you should use StringBuilder for higher efficiency.
PAVAN VADAPALLI
Director of Engineering
Director of Engineering @ upGrad. Motivated to leverage technology to solve problems. Seasoned leader for startups and fast moving orgs. Working …Read More
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upGrad does not grant credit; credits are granted, accepted or transferred at the sole discretion of the relevant educational institution offering the diploma or degree. We advise you to enquire further regarding the suitability of this program for your academic, professional requirements and job prospects before enr...