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请你帮我解决这个问题。阵列实例
问题: 考虑以下数组声明
double readings[];
String urls[];
TicketMachine[] machines;
写作业是完成以下任务:
- 使
readings
变量引用数组是能容纳60个double
值 - 使
urls
变量引用一个数组,该数组能够容纳90个String
对象 - 使
machines
变量引用数组即能保五个TicketMachine
对象
我的回答:
//declare and instantiate object
double readings [] = new double [60];
String urls [] = new String [90];
TicketMachine machines [] = new TicketMachine [5];
我得到的错误是这样的:
Main.java:16: readings is already defined in main(java.lang.String[])
double readings [] = new double [60];
^
Main.java:17: urls is already defined in main(java.lang.String[])
String urls [] = new String [90];
^
Main.java:18: machines is already defined in main(java.lang.String[])
TicketMachine machines [] = new TicketMachine [5];
谢谢各位的帮忙 – user228390 2009-12-31 21:56:59