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