String Literals vs. String Objects in Java: Which Should You Use?

String Objects vs. String Literals

In Java, there are two ways to create a string: using string literals and using string objects. While these two methods may seem similar, there are some key differences between them that you should be aware of.

String Literals

String literals are created by enclosing a sequence of characters in double quotes. For example:

String str = "Hello world";

String literals are immutable, meaning that they cannot be changed once they have been created. They are also interned, which means that all identical string literals will refer to the same object in memory. This can improve performance, as it reduces the amount of memory that is required to store strings.

String Objects

String objects are created using the new keyword. For example:

String str = new String("Hello world");

String objects are mutable, meaning that they can be changed after they have been created. They are not interned, which means that each string object will occupy its own space in memory.

Which should you use?

In general, you should use string literals whenever possible. String literals are easier to read and write, and they are more efficient. However, there are some cases where you may need to use string objects. For example, if you need to modify a string, you will need to use a string object.

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