1 /* 2 * @test /nodynamiccopyright/ 3 * @bug 8206986 4 * @summary Verify reachability in switch expressions. 5 * @compile/fail/ref=ExpressionSwitchUnreachable.out -XDrawDiagnostics --enable-preview -source 12 ExpressionSwitchUnreachable.java 6 */ 7 8 public class ExpressionSwitchUnreachable { 9 main(String[] args)10 public static void main(String[] args) { 11 int z = 42; 12 int i = switch (z) { 13 case 0 -> { 14 break 42; 15 System.out.println("Unreachable"); //Unreachable 16 } 17 default -> 0; 18 }; 19 i = switch (z) { 20 case 0 -> { 21 break 42; 22 break 42; //Unreachable 23 } 24 default -> 0; 25 }; 26 i = switch (z) { 27 case 0: 28 System.out.println("0"); 29 break 42; 30 System.out.println("1"); //Unreachable 31 default : break 42; 32 }; 33 i = switch (z) { 34 case 0 -> 42; 35 default -> { 36 break 42; 37 System.out.println("Unreachable"); //Unreachable 38 } 39 }; 40 i = switch (z) { 41 case 0: break 42; 42 default: 43 System.out.println("0"); 44 break 42; 45 System.out.println("1"); //Unreachable 46 }; 47 i = switch (z) { 48 case 0: 49 default: 50 System.out.println("0"); 51 break 42; 52 System.out.println("1"); //Unreachable 53 }; 54 } 55 56 57 } 58