問題詳情
第9題Given:11. String[] elements = {"for", "tea", "too"};12. String first = (elements.length>0) ? elements[0] : null;What is the result?
(A) Compilation fails.
(B) An exception is thrown at runtime.
(C) The variable first is set to null.
(D) The variable first is set to elements[0]
參考答案
答案：D
難度：適中0.593909
統計：A(41),B(26),C(9),D(117),E(0)
用户評論
【鄒錦翔】評論
三元運算子(條件式) ? "符合條件的答案" : " 不符合條件的答案"就像是if elseString[] elements = {"for", "tea", "too"};String first = (elements.length0) ? elements[0] : null; 如果陣列的長度大於0的就讓字串first =elements[0]，而不滿足這個條件的就讓first=null