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Difference Between String Buffer and String Builder

by Kiranlal VT
May 27, 2022
in Articles, Data Science and Machine Learning, Entri Skilling
Difference Between String Buffer and String Builder
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A string can be explained as a sequence of characters. For example, “Coding” is a string of 6 characters. A string cannot be changed once it is created. A string is an immutable one. A string cannot be changed once it is created because it is constant. In java, the developers rely more on the strings. Strings are the most popular class in the Java programming language. Strings are created with the help of String Literal or it is created by adding a new keyword. In Java, the immutable strings are represented in the UTF-16 format. An advantage of strings in Java in small applications is that whenever a string manipulation is tried, it will create a new string and cancel the old one. The immutable feature of string help to do this.

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The string will generate a new String and cancel the old one if the String Manipulation is performed. This is effective in small operations. When it comes to large applications, the generation of new strings and canceling of older ones will become a hectic process. The garbage in the heap has to be avoided. The reason the String Manipulation can be performed is the immutable feature of the string. So Java comes up with String Buffer and String Builder.

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String Buffer

String Buffer is more like String. String Buffer provides similar functions as the String does. In the case of String, it represents fixed-length, immutable character sequences. But in the case of String Buffer, it represents growable and writable sequence characters. There are many characters prelocated in String Buffer. This is because of giving room to the growth process. It helps to create a sequence of characters that is mutable or modifiable. String buffer class is considered a primitive one. Developers can update the string buffer class easily and effectively. It is faster than the string class. It also provides additional methods like updation, deletion, etc. String Buffer is synchronized and is effective for multiple thread operations.

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String Builder

String Builder is like String Buffer and is an alternative to the String class in Java. We know the string class is immutable. But in the case of String Builder, it is mutable in other words it can modify the sequence of characters. String builder is more comfortable working with a single thread. The reason behind this is, that String Builder is non-synchronized. This feature enables String Builder to work easier and quicker. The principal operations include in String Builder are that append and insert methods. These methods are overloaded and the advantage is that they can accept any data type.

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Difference between String Buffer and String Builder

String Buffer and String Builder are introduced as a replacement for String. A string that is immutable has so many drawbacks and it makes operations not much easy. So Java introduced Sring Buffer and String Builder. Both of these are introduced as a substitute for String. These classes are meant to do operations much more easily and efficiently. Both the classes have many points in common. But there are some differences too. Let us look at some of the key differences between String Buffer and String Builder.

  • Creation

Both String Builder and String Buffer are created in heap memory. But String Buffer was introduced in Java Development kit 1.0 and String Builder was introduced in Java Development Kit 1.5.

  • Type of Strings

The String Builder and String Buffer which is different from java string operate on mutable strings.

  • Multiple Threads

String Buffer is safe in Multiple threads as it is synchronized and String Builder is unsafe in multiple threads, but it is safe in single threads as it is non-synchronized.

  • Speed

String Buffer is faster than String and it is slower than String Builder. String Builder is faster than all of these classes as it does not allow multiple operations at the same time.

  • Efficiency

Compared to String Builder String Buffer is less efficient. String Builder is quicker and is more efficient than String Buffer

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Conclusion

String Buffer and String Builder are Object classes provided by the Java Programming language. The string introduced by Java was less efficient and slow. The nature of string was immutable. So the Java Development kits 1.0 and 1.5 have released String Buffer and String Builder. Both of them were released to cover up the drawbacks of String and they have done it efficiently.

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Kiranlal VT

Kiranlal VT

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