Java基础深拷贝浅拷贝

非基本数据类型需要new新空间

class Student implements Cloneable{private int id;private String name;private Vector course;public Student(){try{Thread.sleep(1000);System.out.println("Student Constructor called.");}catch (InterruptedException e){e.printStackTrace();}}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}public Vector getCourse() {return course;}public void setCourse(Vector course) {this.course = course;}//浅拷贝public Student newInstance(){try{return (Student)this.clone();}catch (CloneNotSupportedException e){e.printStackTrace();}return null;}//深拷贝public Student deepClone(){try{Student cloning = (Student) super.clone();cloning.course = new Vector();return cloning;}catch (CloneNotSupportedException e){e.printStackTrace();}return null;}}public Object clone(){      //覆写clone()，深拷贝  try{  Student cloning = (Student) super.clone(); // 这里不能使用Student cloning = (Student) this.clone()的原因:正在覆写本类的clone()方法，如果再调用本类的函数，即：this.clone()，就相当于无限递归无限死循环了，最终会崩溃的。所以这里：super.clone()。cloning.courses = new Vector();     //关键点：非基本数据类型的空间需要自己新开辟一块儿  return cloning;  }catch(CloneNotSupportedException e){  e.printStackTrace();  }  return null;  
}