Statement can be replaced with enhanced 'switch'

Reports switch statements that can be automatically replaced with enhanced switch statements or expressions.

Example:

double getPrice(String fruit) {
  // Switch statement can be replaced with enhanced 'switch'
  switch (fruit) {
    case "Apple":
      return 1.0;
    case "Orange":
      return 1.5;
    case "Mango":
      return 2.0;
    default:
      throw new IllegalArgumentException();
  }
}

After the quick-fix is applied:

double getPrice(String fruit) {
  return switch (fruit) {
    case "Apple" -> 1.0;
    case "Orange" -> 1.5;
    case "Mango" -> 2.0;
    default -> throw new IllegalArgumentException();
  };
}

Use the Show warning only if conversion to expression is possible option not to warn about conversion to switch statement.
Use the Maximum number of statements in one branch to convert to switch expression option warn about conversion to expression only if each branch has less than the given number of statements.

This inspection only reports if the language level of the project or module is 14 or higher

New in 2019.1

Inspection options

Option	Type	Default
Show warning only if conversion to expression is possible	Checkbox	true
Maximum number of statements in one branch to convert to switch expression	Number	2

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023