浅克隆与深克隆区别

package d12_api_object; public class Test2 { public static void main(String[] args) throws CloneNotSupportedException { //目标：掌握Object类提供的对象克隆方法 //1、protected Object clone():对象克隆 User u1 = new User(1,"min","1120",new double[]{99.0,100.0}); System.out.println(u1.getId()); System.out.println(u1.getUsername()); System.out.println(u1.getPassword()); System.out.println(u1.getScores()); User u2 = (User) u1.clone(); System.out.println(u2.getId()); System.out.println(u2.getUsername()); System.out.println(u2.getPassword()); System.out.println(u2.getScores()); } }

package d12_api_object; //Cloneable是一个标记接口 //规则。 public class User implements Cloneable{ private int id;//编号 private String username;//用户名 private String password;//密码 private double[] scores;//分数 public User(int id, String username, String password, double[] scores) { this.id = id; this.username = username; this.password = password; this.scores = scores; } public User() { } @Override protected Object clone() throws CloneNotSupportedException { //super 去调用父类Object中的clone方法。 return super.clone(); } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public double[] getScores() { return scores; } public void setScores(double[] scores) { this.scores = scores; } }

运行结果：

1 min 1120 [D@4eec7777 1 min 1120 [D@4eec7777

package d12_api_object; public class Test2 { public static void main(String[] args) throws CloneNotSupportedException { //目标：掌握Object类提供的对象克隆方法 //1、protected Object clone():对象克隆 User u1 = new User(1,"min","1120",new double[]{99.0,100.0}); System.out.println(u1.getId()); System.out.println(u1.getUsername()); System.out.println(u1.getPassword()); System.out.println(u1.getScores()); User u2 = (User) u1.clone(); System.out.println(u2.getId()); System.out.println(u2.getUsername()); System.out.println(u2.getPassword()); System.out.println(u2.getScores()); } } package d12_api_object; //Cloneable是一个标记接口 //规则。 public class User implements Cloneable{ private int id;//编号 private String username;//用户名 private String password;//密码 private double[] scores;//分数 public User(int id, String username, String password, double[] scores) { this.id = id; this.username = username; this.password = password; this.scores = scores; } public User() { } @Override protected Object clone() throws CloneNotSupportedException { //super 去调用父类Object中的clone方法。 User u2 = (User) super.clone(); u2.scores = u2.scores.clone(); return u2; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public double[] getScores() { return scores; } public void setScores(double[] scores) { this.scores = scores; } }

运行结果：

1 min 1120 [D@4eec7777 1 min 1120 [D@3b07d329