rspec/rules/S2196/java/rule.adoc

== Why is this an issue?

Since Java 7, ``++String++``s can be used as ``++switch++`` arguments. So when a single ``++String++`` is tested against three or more values in an ``++if++``/``++else if++`` structure, it should be converted to a switch instead for greater readability.


*Note* that this rule is automatically disabled when the project's ``++sonar.java.source++`` is lower than ``++7++``.


=== Noncompliant code example

[source,java]
----
if ("red".equals(choice)) {  // Noncompliant
  dispenseRed();
} else if ("blue".equals(choice)) {
  dispenseBlue();
} else if ("yellow".equals(choice)) {
  dispenseYellow();
} else {
  promptUser();
}
----


=== Compliant solution

[source,java]
----
switch(choice) {
  case "Red":
    dispenseRed();
    break;
  case "Blue": 
    dispenseBlue():
    break;
  case "Yellow":
    dispenseYellow();
    break;
  default:
    promptUser();
    break;
}
----


ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

=== Message

Convert this "if/else if" structure into a "switch".


'''
== Comments And Links
(visible only on this page)

=== is related to: S2145

endif::env-github,rspecator-view[]