Mercurial > jdk8-mips64-public > langtools / annotate
test/tools/javac/lambda/MethodReference51.java@c09b7234cded (annotated)
test/tools/javac/lambda/MethodReference51.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 2193
- d4cbb671de1c
- 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 | * certain cases of erroneous member reference lookup are not handled by Attr.visitReference |
| mcimadamore@1415 | 6 | * @compile/fail/ref=MethodReference51.out -XDrawDiagnostics MethodReference51.java |
| mcimadamore@1415 | 7 | */ |
| mcimadamore@1415 | 8 | class MethodReference51 { |
| mcimadamore@1415 | 9 | |
| mcimadamore@1415 | 10 | private static class Foo { |
| mcimadamore@1415 | 11 | static int j(int i) { return i; } |
| mcimadamore@1415 | 12 | } |
| mcimadamore@1415 | 13 | |
| mcimadamore@1415 | 14 | static Foo foo = new Foo(); |
| mcimadamore@1415 | 15 | |
| mcimadamore@1415 | 16 | static void m(String s) { } |
| mcimadamore@1415 | 17 | static void m(Integer i) { } |
| mcimadamore@1415 | 18 | |
| mcimadamore@1415 | 19 | static int f(String s) { return 1; } |
| mcimadamore@1415 | 20 | |
| mcimadamore@1415 | 21 | static int g(Integer i, Number n) { return 1; } |
| mcimadamore@1415 | 22 | static int g(Number n, Integer i) { return 1; } |
| mcimadamore@1415 | 23 | |
| mcimadamore@1415 | 24 | int h(int i) { return i; } |
| mcimadamore@1415 | 25 | } |
| mcimadamore@1415 | 26 | |
| mcimadamore@1415 | 27 | class TestMethodReference51 { |
| mcimadamore@1415 | 28 | |
| mcimadamore@1415 | 29 | interface IntSam { |
| mcimadamore@1415 | 30 | int m(int i); |
| mcimadamore@1415 | 31 | } |
| mcimadamore@1415 | 32 | |
| mcimadamore@1415 | 33 | interface IntegerIntegerSam { |
| mcimadamore@1415 | 34 | int m(Integer i1, Integer i2); |
| mcimadamore@1415 | 35 | } |
| mcimadamore@1415 | 36 | |
| mcimadamore@1415 | 37 | |
| mcimadamore@1415 | 38 | static void test() { |
| mcimadamore@1415 | 39 | IntSam s1 = MethodReference51::unknown; //method not found |
| mcimadamore@1415 | 40 | IntSam s2 = MethodReference51::f; //inapplicable method |
| mcimadamore@1415 | 41 | IntSam s3 = MethodReference51::g; //inapplicable methods |
| mcimadamore@1415 | 42 | IntegerIntegerSam s4 = MethodReference51::g; //ambiguous |
| mcimadamore@1415 | 43 | IntSam s5 = MethodReference51::h; //static error |
| mcimadamore@1415 | 44 | IntSam s6 = MethodReference51.foo::j; //inaccessible method |
| mcimadamore@1415 | 45 | } |
| mcimadamore@1415 | 46 | } |
