A string is one of the most important concepts in Java programming. String is one of the prebuilt classes in Java. So if you want to manipulate strings, then you could simply create an object of this String class, and using that object, you can manipulate the string however you want. You can then break the string into two parts, based on the substring concept. We can also concatenate two strings. All of this can be done with the help of this String class.

Let's try manipulating a string ourselves. Create a new Java class and name it stringclassdemo.

One of the most common questions asked in almost all Java related interviews is how a programmer can define strings. The answer is that you can use either of the two following ways:

• By defining the String literal
• By creating an object of String

Now let's look at each method, one by one, in order to understand the different ways of declaring a string.