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问题描述
public class AccumulateSavingsBatch { private Bank bank; public void setBank(Bank bank) { this.bank=bank; } public void doBatch() { for (Customer c : bank) { for (Account a : c) { if(a instanceof SavingAccount) { a.accumulateIntersest(); } } } } }
foreach不适用于表达式类型,客户和帐户y会出现此错误?
foreach not applicable to expression type this error appears with customer and account y??
推荐答案您的客户和银行类应实现IEnumerable< t>接口. 对于实现IEnumerable,IEnumerable< t,IList,IList< t>的类的每个作品.等等. Your Customer and Bank Classes Should Implement the interface IEnumerable<t>. For each works with the class which implements IEnumerable, IEnumerable<t>, IList, IList<t> etc.
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我的代码有什么问题?
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