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| 1. 13. 6. 创建并使用一个单一成员的注释 |
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import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
@Retention(RetentionPolicy.RUNTIME)
@interface MySingle {
int value(); // this variable name must be value
}
class Single {
@MySingle(100)
public static void myMeth() {
Single ob = new Single();
try {
Method m = ob.getClass().getMethod("myMeth");
MySingle anno = m.getAnnotation(MySingle.class);
System.out.println(anno.value()); // displays 100
} catch (NoSuchMethodException exc) {
System.out.println("Method Not Found.");
}
}
public static void main(String args[]) {
myMeth();
}
}
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