[开发测试]深拷贝List＜对象＞

public static void main(String[] args) throws CloneNotSupportedException {
        final List<Subscribe> zpResultAdsList = Lists.newArrayList();
        Subscribe zpResultAds = new Subscribe();
        zpResultAds.setUserId("123456");
        zpResultAds.setBid("6000.0");
        zpResultAdsList.add(zpResultAds);
        final Subscribe clone = zpResultAds.clone();
        System.out.println("========对象深拷贝===地址==========");
        System.out.println(zpResultAds.hashCode());
        System.out.println(clone.hashCode());

        //这里有一个坑：初始化目标List时，需要初始化其内存地址，如果只赋值容量，内存为空，会报错
        final List<Object> objects = Lists.newArrayList(10);
        final List<Object> objects3 = Arrays.asList(new Object[10]);
        System.out.println("=====测试List初始化方式=====");
        System.out.println(objects.size());
        System.out.println(objects3.size());


        //浅拷贝
        List dest = Arrays.asList(new Object[zpResultAdsList.size()]);
        Collections.copy(dest, zpResultAdsList);
        System.out.println("Collections.copy========List 对象地址==========");
        System.out.println(zpResultAdsList.hashCode());
        System.out.println(dest.hashCode());


        //浅拷贝
        List<String> stringsSrc = Lists.newArrayList("12", "13", "14");
        List<String> stringsTarget = Arrays.asList(new String[10]);
        Collections.copy(stringsTarget, stringsSrc);
        System.out.println("Collections.copy========List String地址==========");
        System.out.println(stringsSrc.hashCode());
        System.out.println(stringsSrc.hashCode());

        final Object[] objects1 = zpResultAdsList.toArray();

        final Object[] objects2 = new Object[objects1.length];
        System.arraycopy(objects1, 0, objects2, 0, zpResultAdsList.size());

        //深拷贝
        System.out.println("System.arraycopy========数组地址==========");
        System.out.println(objects1.hashCode());
        System.out.println(objects2.hashCode());

        //深拷贝
        final Cloner cloner = new Cloner();
        final List<Subscribe> zpResultAds1 = cloner.deepClone(zpResultAdsList);
        System.out.println(zpResultAdsList.hashCode());
        System.out.println(zpResultAds1.hashCode());
        /** 
        <dependency>
            <groupId>io.github.kostaskougios</groupId>
            <artifactId>cloning</artifactId>
            <version>1.10.3</version>
        </dependency>
        */
        
    }

@Data
public class Subscribe implements Cloneable {

    private String bid;

    private String userId;


    @Override
    public Subscribe clone() throws CloneNotSupportedException {
        Subscribe zpResultAds = null;
        try {

            zpResultAds = (Subscribe) super.clone();
        } catch (Exception e) {
            System.out.println("对象深拷贝异常" + e);
        }
        return zpResultAds;
    }
}

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