深入浅析Java中对象的深复制与浅复制

// 课程对象class Class {  private String name;  public String getName() {    return name;  }  public void setName(String name) {    this.name = name;  }}// 学生对象class User implements Cloneable {  private String name;  private Long id;  // 课程引用  private Class c;  public Class getC() {    return c;  }  public void setC(Class c) {    this.c = c;  }  public String getName() {    return name;  }  public void setName(String name) {    this.name = name;  }  public Long getId() {    return id;  }  public void setId(Long id) {    this.id = id;  }  @Override  protected Object clone() throws CloneNotSupportedException {    return super.clone();  }  @Override  public int hashCode() {    return super.hashCode();  }  @Override  public boolean equals(Object obj) {    if (obj instanceof User) {      User user = (User) obj;      if (this.id == user.getId() && this.getName() == user.getName()) {        return true;      }      if (user.getId().equals(this.id)          && user.getName().equals(this.name)) {        return true;      }      return false;    } else      return false;  }}