Created
September 29, 2016 11:03
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脱法FizzBuzz
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class Main { | |
public static void main(String[] args) { | |
for(ClassLoader loader : new ClassLoader[]{new ClassLoader() { | |
{ | |
if (java.util.stream.Stream.of(javax.xml.bind.DatatypeConverter.parseHexBinary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| |
.peek(bytes -> defineClass("FizzBuzz", bytes, 0, bytes.length)) | |
.findFirst().isPresent()) {} | |
} | |
}}) { | |
try { | |
for (Class<?> fizzBuzz : java.util.Collections.singleton(loader.loadClass("FizzBuzz"))) | |
for (Object instance : java.util.Collections.singleton(fizzBuzz.getConstructor().newInstance())) | |
for (java.lang.reflect.Method method : java.util.Collections.singleton(fizzBuzz.getDeclaredMethod("fizzBuzz"))) | |
if(method.invoke(instance) != null) {} | |
} catch (ReflectiveOperationException e) { | |
} | |
} | |
} | |
} |
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