请高手帮我调试下面，最好能解释一下。送100分，不成敬意，谢谢！

Question

ExecutiveCollection.exObjects 没有new出来

Answer 1

CustomerCareExecutive exObjects[];
exObjects[]这个对象数组没有实例化！

Answer 2

CustomerCareExecutive exObjects[] = new CustomerCareExecutive[3];

Answer 3

CustomerCareExecutive exObjects[] = new CustomerCareExecutive[3];

Answer 4

exObjects[0].rating=Integer.parseInt("30+40");这一句也有问题，exObjects.rating值肯定不会是70，而且这一句要产生异常。Integer.parseInt(String s)其中s的各个组成部分必须全部是十进制数字，但第一位可以是-表示负数。exObjects[0].rating=Integer.parseInt("70");应该就没问题了。还有就是楼上各位说的初始化问题了。

Answer 5

class CustomerCareExecutive{
    String executiveName;
    int rating;
    public void displayDetails(){
        System.out.println(executiveName);
        System.out.println(rating);
    }
}
public class ExecutiveCollection {
    CustomerCareExecutive exObjects[] = new CustomerCareExecutive[3]; // Modified
    ExecutiveCollection(){
        for(int ctr=0;ctr!=3;ctr++){
            exObjects[ctr]=new CustomerCareExecutive();
        }
        exObjects[0].executiveName="Smart Cells Inc";
        exObjects[0].rating=Integer.parseInt("30");  // Modified
        exObjects[1].executiveName="AlkaTel";
        exObjects[1].rating=85;
        exObjects[2].executiveName="CellTalk Inc";
        exObjects[2].rating=60;
    }
    public void displayCollection(){
        for(int ctr=0;ctr!=3;ctr++){
            exObjects[ctr].displayDetails();
        }
    }
    public static void main(String arg[]){
        ExecutiveCollection collectionObj;
        collectionObj=new ExecutiveCollection();
        collectionObj.displayCollection();
        System.out.println("All Records displayed");
    }
}