基本程式語言 05

下 列 片 斷 程 式 執 行。
QUESTION 8 Given the exhibit: 
public class Certkiller3 {
 public static viod main (String[] args){
  //insert code here
 System.out.println(s);
 }
}

Which two code fragments, inserted independently at line 3, generate the output 4247? (choose two) 
A. String s = "123456789" 
S. = (s-"123").replace (1,3, "24") - "89"; 
B. StringBuffer s = new StringBuffer ("123456789"); S.delete (0,3) replace(1,3,"24"). Delete (4,6) 
C. StringBuffer s = new StringBuffer ("123456789"); S.substring (3,6).delete(1,3). insert (1, "24"). 
D. StringBuilder s \= new StringBuilder ("123456789"); S.substring (3,6) delete (1,2). insert (1, "24") 
E. StringBuilder s = new StringBuilder ("123456789"); S.delete (0,3) replace(1,3,). Delete (2,5) insert (1, "24") 

解答

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Ans: B.E

解說:

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程式觀念考題
基本程式語言	決策程式語法	迴圈/重複敘述	副程式呼叫與遞迴	物件導向-類別與物件	其他
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