SCJP題庫第044題
1. class Employee{
2. String name; double baseSalary;
3. public Employee(String name, double baseSalary){
4. this.name = name;
5. this.baseSalary = baseSalary;
6. }
7. }
8. public class SalesPerson extends Employee{
9. double commission;
10. public SalesPerson(String name,
11. double baseSalary, double commission){
12. //insert code here
13. }
14.}
Which two code fragments, inserted independently at line 12, will compile? (Choose two.)
A. super(name, baseSalary);
B. this.commission = commission;
C. super();
this.commission = commission;
D. this.commission = commission;
super();
E. super(name, baseSalary);
this.commission = commission;
F. this.commission = commission;
super(name, baseSalary);
G. super(name, baseSalary, commission);
Ans:A E
解說:
由於父類別Employee沒有“無參數”的建構子，所以本程式要能編譯，必須要避免編譯器為SalesPerson的建構子加上super()，於是就加A/E，加上明確的呼叫父類別的建構子Employee(String name, double baseSalary)
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