Can characters be used in switch-case?

The value of the expressions in a switch-case statement must be an ordinal type i.e. integer, char, short, long, etc. Float and double are not allowed.

Contains(“test”) can evaluate true or false depending on the message so it is not a constant thus cannot be used as a ‘case ‘ for switch statement.15 Kas 2011

It is recommended to use String values in a switch statement if the data you are dealing with is also Strings . The expression in the switch cases must not be null else, a NullPointerException is thrown (Run-time). Comparison of Strings in switch statement is case sensitive.

You can use char ‘s for the switch expression and cases as well .

You can’t switch on conditions like x. contains() . Java 7 supports switch on Strings but not like you want it. Use if etc.

1) The expression used in switch must be integral type ( int, char and enum) . Any other type of expression is not allowed. 2) All the statements following a matching case execute until a break statement is reached.