// version 17:
public class Switch17 {
	String switchPatternMatching(Object o) {
		return switch (o) {
			case Integer i	-> String.format("int %d", i);
			case Long l		-> String.format("long %d", l);
			case Double d	-> String.format("double %f", d);
			case String s	-> String.format("String %s", s);
			default			-> o.toString();
		};
	}

	String switchNull(Object o) {
		return switch (o) {
			case null, default	-> "?";
		};
	}

	String switchGuardPattern(Object o) {
		return switch (o) {
			case String s && s.length() > 1	-> s;
			default							-> o.toString();
		};
	}

	String switchParenthesizedPattern(Object o) {
		return switch (o) {
			case (String s)	-> s;
			default			-> o.toString();
		};
	}
}