单项选择题 现有代码片段: String s="123"; String sl=S+456; 请问sl的结果是哪项?()
单项选择题 现有: class Test2 f public static void main (String [] args) { short a,b,C; a=l; b=2; C=a+b; a+=2: } 以上代码中,哪一句是错误的?()
单项选择题 现有: class Wrench2 { int size; public static void main(String [] args) { Wrench2 w=new Wrench2(); w.size=II; Wrench2 w2=go(w, w.size); System. out .print (w2. size); } static Wrench2 go(Wrench2 wr. int s) { S=12; return wr; } } 结果为()