Prior to
Java 7, only integer values were the valid arguments in a switch statement.
It is not
uncommon to make a decision based on a string value, up till now developers
have been using if statements whenever there is a need to make a decision based
on String values, use of String in switch statement simplify and result in more
readable and efficient code.
Code Snippet to display the use of String in Switch Statement
String day;
day= "";
switch(day){
case "Monday" :
System.out.println("1st
Day");
break;
case "Tuesday" :
System.out.println("2nd Day
");
break;
default:
System.out.println("Holiday
");
}
When
using strings, you need to be careful about the following two issue
- Null values for strings : Using a string reference variable that is assigned a null value will result in a java.lang.NullPointerException.
- The case of the string : The evaluation of a case expression is case sensitive in a switch statement.
