A String is an object that represents a sequence of characters.
For example, “HelloWorld” is a string of 10 characters.
String s = "HelloTech";
The + (plus) operator between strings adds them together to make a new string. This process is called concatenation.The resulted string is the first string put together with the second string.For example:
String firstName, lastName; firstName = "sani"; lastName = "kamal"; System.out.println("My name is " + firstName +" "+lastName); // Prints: My name is sani kamal