The notable differences between concat() method and +operator are:
concat() method | +operator |
---|---|
You cannot concat a null value to a String using the concat() method. | You can concat null value using the ‘+’ operator. |
Using the concat() method you can concat only two String variables. | Using the ‘+’ operator you can concat multiple values. |
Using the concat() method you can concat only String type of arguments. | Using the ‘+’ operator you can concat any type of arguments. |