Back Java Strings Tutorial | String Manipulation in Java | Java Tutorial For Beginners | Edureka

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Created By: edureka!
Published At: 2018-11-07
Search Query: Java Strings
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This Edureka tutorial on โ€œJava Stringsโ€ will talk about one of the most important classes of Java i.e String class. It will also talk about the various methods and interfaces implemented by the String class. Through this tutorial you will learn the following topics:
[0:48] Java Strings
[6:13] String Pool
[6:54] Creating a String
[11:00] String Methods

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@ramanujpathak5400
2022-04-07

Teaching style is very much brilliant and it's quality makes its brilliance very much high.

@edurekaIN

Hey:) Thank you so much for your sweet words :) Really means a lot ! Glad to know that our content/courses is making you learn better :) Our team is striving hard to give the best content. Keep learning with us -Team Edureka :) Don't forget to like the video and share it with maximum people:) Do subscribe the channel:)

VidTutorAssistant (GPT-4)

Thank you @ramanujpathak5400 for your wonderful feedback! We are glad you appreciate the teaching style and quality of our content, as we strive to deliver high-quality, brilliant, and clear explanations for complex concepts like Java strings. Stay tuned to our channel for more insightful videos on various topics. Happy learning!


@vigneshsweekaran2096
2018-12-22

Since stringbuilder is not threadsafe. then what is the need of stringbuilder ?. we can directly work with stringbuffer right.

@edurekaIN

Hey Vignesh, "String does not allow appending. Each method you invoke on a String creates a new object and returns it. This is because String is immutable - it cannot change its internal state.

On the other hand StringBuilder is mutable. When you call append(..) it alters the internal char array, rather than creating a new string object.

Thus it is more efficient to have"

Hope this helps!

VidTutorAssistant (GPT-4)

Hello @vigneshsweekaran2096, good question! Yes, StringBuilder is not thread-safe, which means it doesn't ensure synchronization when multiple threads are accessing the same instance. Now you may ask, why we need it when we already have the thread-safe StringBuffer class?

While thread safety is an important factor to consider, it does come at the cost of performance. Synchronization can be expensive in certain setups and scenarios. StringBuilder was introduced in Java as an alternative to StringBuffer when you are working with single-threaded environments. In these cases, StringBuilder's ability to perform faster string manipulations outweighs the need for thread safety.

This makes StringBuilder a beneficial choice when you are dealing with large amounts of data in a single-threaded environment. Hope this clears up your doubt! Stay tuned for more informative videos. Happy Learning!


@dktailor123
2018-11-09

Why there is two way to create String
And in which case we can go for String literal and in which case we can go for using new operator to create String

@edurekaIN

Hey Deepak, "Hi,
When you create a String using literal, it is created in the string pool. Now if you try to create another object with the same value, JVM will give you the reference of that string and no new String object will be created. But when you create a String using new() keyword JVM is forced to create a new string reference, even if the String is already present in the reference pool. Hope this clears your doubt. Cheers!"

Hope this helps!

VidTutorAssistant (GPT-4)

Hello @dktailor123, great questions! There are indeed two ways to create String in Java, each has its particular use cases.

When we create a String using String literal, Java first checks the "String pool." This is a storage area in the heap memory where literal Strings are stored. If the same String value already exists in the pool, Java simply refers to that existing object rather than creating a new one. This is more memory-efficient, especially when handling multiple identical String values. However, it should be kept in mind that the value for these Strings is immutable, meaning it cannot be changed once created.

On the other hand, using the 'new' keyword to create a String takes it out of the realm of the String pool. This will create a new String object in the heap memory each time, regardless of whether an identical string already exists. This method is beneficial when you want mutable strings, i.e., strings whose values can be changed.

In summary, choose string literals when you are dealing with string values that won't require changes and when memory efficiency is a priority. Opt for creating String using the 'new' keyword when you require mutable strings and when the creation of discrete separate String objects is needed.

I hope this helps! If you have more queries, feel free to drop a comment. Keep learning with edureka! ๐Ÿ˜Š