?

自驗(yàn)證：創(chuàng)建Class Student兩個(gè)類， Student中含有Class對(duì)象

public class Class implements Cloneable {
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    private String name;

    public Class(String name) {
        this.name = name;
    }

    @Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}

public class Student implements Cloneable {
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Class getClazz() {
        return clazz;
    }

    public void setClazz(Class clazz) {
        this.clazz = clazz;
    }

    private String name;
    private int age;
    private Class clazz;

    public Student(String name, int age, Class clazz) {
        this.name = name;
        this.age = age;
        this.clazz = clazz;
    }

    @Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}

測(cè)試代碼：

public class Copy {
    public static void main(String[] args) throws CloneNotSupportedException {
        Class clazz = new Class("一班");
        Student student = new Student("張三", 18, clazz);
        Student newStudent = (Student) student.clone();
        student.getClazz().setName("二班");

        System.out.println("=== student===");
        System.out.println(student);
        System.out.println(student.getName());
        System.out.println(student.getAge());
        System.out.println(student.getClazz());
        System.out.println(student.getClazz().getName());

        System.out.println("=== newStudent===");
        System.out.println(newStudent);
        System.out.println(newStudent.getName());
        System.out.println(newStudent.getAge());
        System.out.println(newStudent.getClazz());
        System.out.println(newStudent.getClazz().getName());

    }
}

輸出：

可以看到不同的Student對(duì)象，但是有相同的Class對(duì)象

修改Student clone方法：

@Override
    protected Object clone() throws CloneNotSupportedException {
        Student student = (Student) super.clone();
        student.setClazz((Class) clazz.clone());
        return student;
    }

可以看到不同的class對(duì)象，不同的值：

知識(shí)來源：

【23版面試突擊】什么是淺拷貝和深拷貝_嗶哩嗶哩_bilibili

強(qiáng)引用、弱引用介紹：

https://www.cnblogs.com/Scott007/archive/2013/05/15/3080739.html文章來源地址http://www.zghlxwxcb.cn/news/detail-669277.html

到了這里，關(guān)于java八股文面試[java基礎(chǔ)]——淺拷貝和深拷貝的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！