The value for a case must be of the same data type as the variable in the switch. The value for a case must be a constant or a literal. Variables are not allowed.
Which data type Cannot be used in switch case in Java?
There must be a good reason why the long primitive data type is not allowed.
Which data type is not allowed in switch case?
1) The expression used in switch must be integral type ( int, char and enum). Any other type of expression is not allowed.
What data types can be used with switch in Java?
A switch works with the byte , short , char , and int primitive data types. It also works with enumerated types (discussed in Enum Types), the String class, and a few special classes that wrap certain primitive types: Character , Byte , Short , and Integer (discussed in Numbers and Strings).
Can we use float in switch case in Java?
Switch case allows only integer and character constants in case expression. We can’t use float values. It executes case only if input value matches otherwise default case executes.
Can we have expression in switch case?
The expression in the switch can be a variable or an expression – but it must be an integer or a character. You can have any number of cases however there should not be any duplicates. Switch statements can also be nested within each other. The optional default case is executed when none of the cases above match.
Which among the following datatypes are used in switch-case statements?
the datatypes which are allowed in switch case are int,char byte,short. The data type of case labels of switch statement are integer and character in c .
Which is not a Jumping statement?
Option b states the goto statement which is used to tells the compiler to jump in anywhere in the program. … Hence it is not a jump statement.
Which of the following variable types is permitted in a switch statement?
The variable used in a switch statement can only be integers, convertable integers (byte, short, char), strings and enums. You can have any number of case statements within a switch.
Can we use expression in switch-case in Java?
Java allows us to use strings in switch expression since Java SE 7. The case statement should be string literal.
Can we use enum in switch-case?
Yes, You can use Enum in Switch case statement in Java like int primitive. … One of the best example of Enum in Java is replace enum int pattern and enum String pattern. You can also use Enum to write Thread-safe Singleton in Java.