记录一下关于深浅拷贝的问题
public class Citation implements Cloneable{
private Student stu;
public Student getStu() {
return stu;
}
public void setStu(Student stu) {
this.stu = stu;
}
public void show() {
System.out.println(stu.getName() + "同学:在2020学年第一学期中表现优秀,被评为三好学生。特发此状!");
}
@Override
public Citation clone() throws CloneNotSupportedException {
Citation cloned = (Citation) super.clone();
cloned.stu = stu.clone();
return cloned;
}
}
public class Student implements Cloneable {
private String name;
private String address;
public Student(String name, String address) {
this.name = name;
this.address = address;
}
public Student() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
protected Student clone() throws CloneNotSupportedException {
return (Student) super.clone();
}
}
上面两个是实体类,具体需要满足替换奖状的名字
@Test
void contextLoads() throws CloneNotSupportedException {
Citation c1 = new Citation();
Student stu = new Student("张三", "西安");
c1.setStu(stu);
//复制奖状
Citation c2 = c1.clone();
//获取c2奖状所属学生对象
Student stu1 = c2.getStu();
stu1.setName("李四");
//判断stu对象和stu1对象是否是同一个对象
System.out.println("stu和stu1是同一个对象?" + (stu == stu1));
System.out.println("c1和c2是同一个对象?"+ (c1==c2));
c1.show();
c2.show();
}
问题是:在clone方法是浅拷贝的情况下,是否是只要实现cloneable接口,覆盖clone方法就可以实现深拷贝?有知道大佬回答一下。
注:大部分代码来源于黑马设计模式的原型模式部分