Define a metadata. Test.java
Package maoxiang.examples.jdk15.metadata;
Import java.lang.annotation. *;
/ **
* Indeicates what the annotated method is a test method.
* This Annotation SHOULD BE Used Only On Parameterless Static Methods.
* /
@ReTENTION (RETENTIONPOLICY.RUNTIME)
@Target (ElementType.Method)
Public @Iterface test {}
Use metadata in other classes. Foo.java
Package maoxiang.examples.jdk15.metadata;
/ **
* @Author Mao Xiang
*
* /
Public class foo {
Public static void main (String [] args) {
}
@Test public static void m1 () {}
Public static void m2 () {}
@Test Public Static Void M3 () {
Throw new runtimeException ("boom");
}
Public static void m4 () {}
@Test Public Static Void M5 () {}
Public static void m6 () {}
@Test Public Static Void M7 () {
Throw New RuntimeException ("Crash");
}
Public static void m8 () {}
}
Use metadata. Runtests.java
Package maoxiang.examples.jdk15.metadata;
Import java.lang.reflect.method;
Import maoxiang.examples.jdk15.metadata.demo.test;
/ **
* @Author Mao Xiang
*
* /
Public class runtests {
Public static void main (string [] args) throws exception {
INT passed = 0, failed = 0;
For (Method M: Class.Forname (Args [0]). getMethods ()) {
IF (M.isannotationPresent (MaoXiang.examples.jdk15.metata.test.class) {
Try {
M.INVoke (NULL);
PaSSED ;
} catch (throwable ex) {
System.out.Printf ("Test% s Failed:% S% N", M, EX.GETCAUSE ());
Failed ;
}
}
}
System.out.printf ("Passed:% D, FAILED% D% N", PASSED, FAILEDs;
}
}
