In Java, a String is a sequence of characters. There are often programming situations where you will need to concatenate Strings. There are several ways in which you can achieve this. The + operator is also known as the concatenation operator. It can be used to concatenate Strings. The following code demonstrates this:
This code creates two Strings called string1 and string2. It uses the + operator to concatenate them and assign the result to a separate variable. So, this code prints the following output:
Hello World
This approach can be used to concatenate more than two values. Not only that, it can be used to concatenate other types of values like primitives as shown below:
String result = “Hello”+” World”+” 2“+” times!”;
So, this code prints the following output:
Hello World 2 times!
The downside of this approach is that it is not very efficient. Since String is immutable, every time you use the + operator, a new String is created.