Java

In Java programming language, the implements keyword is utilized to indicate that a class is implementing an interface.

The var keyword in Java is a way to declare different data types like strings, integers, etc. in Java without explicitly defining these data types

The matches() method of string in Java matches the regex with the specified string. It returns the output in a boolean type as true or false

To split a string in Java different methods are utilized including the split() method, the methods of the split Tokenizer class, and the Pattern class

The Java string indexOf() method returns the index of the character or a substring. There are four variants and multiple applications of this method

The extend keyword in Java inherits one class from another class. All the functions and the properties of the base class are also part of the derived class

The join() method of string in Java connects the declared string with a specified delimiter. It can also be used to join the elements of ArrayList, HashMaps, etc.

The ArrayList contains() method in Java searches for the required element and returns a boolean value of “true” if the element is present otherwise “false”