Question

大家好我正在尝试深度复制类A.我无法深度复制类A.订阅是一个包含SubscriptionYear对象的数组引用。有人可以帮我使用克隆方法进行深层复制。

public class A {

private String countryNames;
private SubscriptionYear[] subscriptions;
private int size;
private int location;

public A(String country)
{
    this.countryNames = country;
}
public A(String country, int arraylength)
{
    this.countryNames = country;
    this.size = arraylength;
    subscriptions = new SubscriptionYear[size];
    location = 0;
}
//adds the subscription.
public void addSubscriptionYear(int year, double subscription)
{
        subscriptions[location]= new SubscriptionYear(year, subscription);
        ++location;
}

订阅年份：

public class SubscriptionYear {

private int year;
private double subscriptions;

public SubscriptionYear(int year,double subscriptions)
{
    setYear(year);
    setSubscription(subscriptions);
}
public void setYear(int Year)
{
    this.year= Year;
}
public void setSubscription(double value)
{
    this.subscriptions = value;
}
public int getYear()
{
    return year;
}
public double getSubscription()
{
    return subscriptions;
}

Answer 1

public Object clone() {
    A newA = new A(countryNames);
    newA.size = size;
    newA.subscriptions = new SubscriptionYear[size];
    for(SubscriptionYear subYear : subscriptions) {
        newA.addSubscriptionYear(subYear.getYear(), subYear.getSubscription());
    }
    return newA;
}

Answer 2

好的，我解决了我的问题。这个解决方案解决了我的问题：

public Object clone() {
A newA = new A(this.countryNamse, this.arraylength);

for(int i=0;i<this.newA.subscriptions.length;i++) {
   newA.subscriptions[i] = subscriptions[i[]; 
 }
return newA;
 }

使用clone方法进行深度复制

2 个答案: