实例化的cust为什么是个数组

Question

public class Customer {

}
 

public class CustomersList {
private Customer [] customers;
private int total=0;
public Customer[] getCustomers() {
    return customers;
}
public void setCustomers(Customer[] customers) {
    this.customers = customers;
}

public CustomersList(Customer[] customers, int total) {
    
    this.customers = customers;
    this.total = total;
}

public CustomersList(int totalCustmer) {//指明数组的长度
    customers=new Customer[totalCustmer];
    
}

 

public class CustomersView {
    CustomersList cust=new CustomersList(20);

    public CustomersView(){
        
        Customer c2=new Customer("tom", '男', 26, 175168655, "[e-mail]");
        cust.addCustomer(c2);
    }}

Answer 1

因为你新建了数组

public CustomersList(int totalCustmer) {//指明数组的长度
    customers=new Customer[totalCustmer];
    
}

调用了这个构造函数