Ikk：新頁面: 11. public class Rainbow { 12. public enum MyColor { 13. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff); 14. private final int rgb; 15. MyColor(int rgb){this.rgb = r...

2013-03-30T05:53:27Z

新頁面: 11. public class Rainbow { 12. public enum MyColor { 13. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff); 14. private final int rgb; 15. MyColor(int rgb){this.rgb = r...

新頁面

11. public class Rainbow {
12. public enum MyColor {
13. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff);
14. private final int rgb;
15. MyColor(int rgb){this.rgb = rgb;}
16. public int getRGB(){return rgb;}
17. }
18. public static void main(String[] args){
19. //insert code here
20. }
21. }

Which code fragment inserted at line 19, allows the Rainbow class to compile?
A. MyColor skyColor = BLUE;
B. MyColor treeColor = MyColor.GREEN;
C. if(RED.getRGB() < BLUE.getRGB()){}
D. Compilation fails due to other error(s) in the code.
E. MyColor purple = new MyColor(0xff00ff);
F. MyColor purple = MyColor.BLUE + MyColor.RED;

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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: B </span>

<span style="font-size:medium;"> 解說:
第19行插入那一個程式片段可使Rainbow類別可以被編譯？
列舉型態可視為類別的內部靜態類別，使用時以使用靜態成員的方式。
MyColor treeColor = MyColor.GREEN;

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{{SCJP 1.6版考題講解}}

SCJP 1.6版考題 094 - 修訂歷史

Ikk：新頁面: 11. public class Rainbow { 12. public enum MyColor { 13. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff); 14. private final int rgb; 15. MyColor(int rgb){this.rgb = r...