SCJP 1.6版考題 094
出自 陳富國維基館
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;
解答
Ans: B
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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