Mercurial > jdk8-mips64-public > langtools / annotate
test/tools/javac/lambda/MethodReference47.java@c09b7234cded (annotated)
test/tools/javac/lambda/MethodReference47.java
Tue, 14 May 2013 11:11:09 -0700
- author
- rfield
- date
- Tue, 14 May 2013 11:11:09 -0700
- changeset 1752
- c09b7234cded
- parent 1415
- 01c9d4161882
- child 2000
- 4a6acc42c3a1
- permissions
- -rw-r--r--
8012556: Implement lambda methods on interfaces as static
8006140: Javac NPE compiling Lambda expression on initialization expression of static field in interface
Summary: Lambdas occurring in static contexts or those not needing instance information should be generated into static methods. This has long been the case for classes. However, as a work-around to the lack of support for statics on interfaces, interface lambda methods have been generated into default methods. For lambdas in interface static contexts (fields and static methods) this causes an NPE in javac because there is no 'this'. MethodHandles now support static methods on interfaces. This changeset allows lambda methods to be generated as static interface methods. An existing bug in Hotspot (8013875) is exposed in a test when the "-esa" flag is used. This test and another test that already exposed this bug have been marked with @ignore.
Reviewed-by: mcimadamore
| mcimadamore@1415 | 1 | /* |
| mcimadamore@1415 | 2 | * @test /nodynamiccopyright/ |
| mcimadamore@1415 | 3 | * @bug 8003280 |
| mcimadamore@1415 | 4 | * @summary Add lambda tests |
| mcimadamore@1415 | 5 | * check that generic method reference is inferred when type parameters are omitted |
| mcimadamore@1415 | 6 | * @compile/fail/ref=MethodReference47.out -XDrawDiagnostics MethodReference47.java |
| mcimadamore@1415 | 7 | */ |
| mcimadamore@1415 | 8 | public class MethodReference47 { |
| mcimadamore@1415 | 9 | |
| mcimadamore@1415 | 10 | static int assertionCount = 0; |
| mcimadamore@1415 | 11 | |
| mcimadamore@1415 | 12 | static void assertTrue(boolean cond) { |
| mcimadamore@1415 | 13 | assertionCount++; |
| mcimadamore@1415 | 14 | if (!cond) |
| mcimadamore@1415 | 15 | throw new AssertionError(); |
| mcimadamore@1415 | 16 | } |
| mcimadamore@1415 | 17 | |
| mcimadamore@1415 | 18 | interface SAM1 { |
| mcimadamore@1415 | 19 | void m(Integer s); |
| mcimadamore@1415 | 20 | } |
| mcimadamore@1415 | 21 | |
| mcimadamore@1415 | 22 | interface SAM2 { |
| mcimadamore@1415 | 23 | void m(Integer s); |
| mcimadamore@1415 | 24 | } |
| mcimadamore@1415 | 25 | |
| mcimadamore@1415 | 26 | static class Foo<X extends Number> { |
| mcimadamore@1415 | 27 | Foo(X x) { } |
| mcimadamore@1415 | 28 | } |
| mcimadamore@1415 | 29 | |
| mcimadamore@1415 | 30 | static <X extends Number> void m(X fx) { } |
| mcimadamore@1415 | 31 | |
| mcimadamore@1415 | 32 | static void g1(SAM1 s) { } |
| mcimadamore@1415 | 33 | static void g2(SAM1 s) { } |
| mcimadamore@1415 | 34 | static void g2(SAM2 s) { } |
| mcimadamore@1415 | 35 | |
| mcimadamore@1415 | 36 | public static void main(String[] args) { |
| mcimadamore@1415 | 37 | g1(MethodReference46::m); |
| mcimadamore@1415 | 38 | g2(MethodReference46::m); |
| mcimadamore@1415 | 39 | } |
| mcimadamore@1415 | 40 | } |
