@Test(expected = Exception.class) public void key_input_digneg_throws_Exception() throws Exception { key(1, -1); }
private int key(Integer element, int digit) throws IllegalArgumentException { return -1; }
RadixSort { private int key(Integer element, int digit) throws IllegalArgumentException { return -1; } }
RadixSort { private int key(Integer element, int digit) throws IllegalArgumentException { return -1; }  }
RadixSort { private int key(Integer element, int digit) throws IllegalArgumentException { return -1; }  void sort(Integer[] elements); }
RadixSort { private int key(Integer element, int digit) throws IllegalArgumentException { return -1; }  void sort(Integer[] elements);  }