1 /** 2 * @test /nodynamiccopyright/ 3 * @bug 8206986 4 * @compile/fail/ref=MultipleLabelsExpression-old.out -source 9 -Xlint:-options -XDrawDiagnostics MultipleLabelsExpression.java 5 * @compile --enable-preview -source 12 MultipleLabelsExpression.java 6 * @run main/othervm --enable-preview MultipleLabelsExpression 7 */ 8 9 import java.util.Objects; 10 import java.util.function.Function; 11 12 public class MultipleLabelsExpression { 13 public static void main(String... args) { 14 new MultipleLabelsExpression().run(); 15 } 16 17 private void run() { 18 runTest(this::expression1); 19 } 20 21 private void runTest(Function<T, String> print) { 22 check(T.A, print, "A"); 23 check(T.B, print, "B-C"); 24 check(T.C, print, "B-C"); 25 check(T.D, print, "D"); 26 check(T.E, print, "other"); 27 } 28 29 private String expression1(T t) { 30 return switch (t) { 31 case A -> "A"; 32 case B, C -> { break "B-C"; } 33 case D -> "D"; 34 default -> "other"; 35 }; 36 } 37 38 private void check(T t, Function<T, String> print, String expected) { 39 String result = print.apply(t); 40 if (!Objects.equals(result, expected)) { 41 throw new AssertionError("Unexpected result: " + result); 42 } 43 } 44 45 enum T { 46 A, B, C, D, E; 47 } 48 }