現(xiàn)有代碼片段: String s="123"; String sl=S+456; 請問sl的結(jié)果是哪項?()
A. 123456 B. 579 C.編譯錯誤 D.運行時拋出異常
現(xiàn)有: class Test2 f public static void main (String [] args) { short a,b,C; a=l; b=2; C=a+b; a+=2: } 以上代碼中,哪一句是錯誤的?()
A.a=1: B.C=a+b; C.a+=2; D.short a,b,C;
現(xiàn)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; } } 結(jié)果為()
A. 11 B. 12 C.編譯失敗 D.運行時異常被拋出