java day011课后作业

package myproject2;

public class CustomerList {
    private Customer[] customers;
    private int total = 0;
    public CustomerList(int totalCustomer) {
    	customers = new Customer[totalCustomer];
    }
    public boolean addCustomer(Customer customer) {
    	if(total >= customers.length)  return false;
    	
    	customers[total++] = customer;
    	return true;
    }
    public boolean replaceCustomer(int index,Customer cust) {
    	if(index < 0 || index >= total) return false;
    	
    	customers[index] = cust;
    	return true;
    }
    public boolean deleteCustomer(int index) {
    	if(index < 0 || index >= total) return false;
    	
    	for(int i = index;i < total - 1;i++) {
    		customers[i] = customers[i+1];
    	}
    	
    	customers[--total] = null;
    	return true;
    }
    public Customer[] getAllCustomers() {
    	Customer[] custs = new Customer[total];
    	for(int i = 0;i < total;i++) {
    	   custs[i] = customers[i];
    	}
    	return custs;
    }
    public int getTotal() {
    	return total;
    }
    public Customer getCustomer(int index) {
    	if(index < 0 || index >= total) return null;
    	return customers[index];
    }
}