if
statements that can be replaced with switch
statements.
The replacement result is usually shorter and clearer.
Example:
void test(String str) {
if (str.equals("1")) {
System.out.println(1);
} else if (str.equals("2")) {
System.out.println(2);
} else if (str.equals("3")) {
System.out.println(3);
} else {
System.out.println(4);
}
}
After the quick-fix is applied:
void test(String str) {
switch (str) {
case "1" -> System.out.println(1);
case "2" -> System.out.println(2);
case "3" -> System.out.println(3);
default -> System.out.println(4);
}
}
This inspection only reports if the language level of the project or module is 7 or higher.
Use the Minimum number of 'if' condition branches field to specify the minimum number of if
condition branches
for an if
statement to have to be reported. Note that the terminal else
branch (without if
) is not counted.
Use the Suggest switch on numbers option to enable the suggestion of switch
statements on
primitive and boxed numbers and characters.
Use the Suggest switch on enums option to enable the suggestion of switch
statements on
enum
constants.
Use the Only suggest on null-safe expressions option to suggest switch
statements that can't introduce a NullPointerException
only.