6-5 jmu-Java-03面向对象基础-clone方法、标识接口、深拷贝 (10分)

最新推荐文章于 2025-10-07 20:49:51 发布

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本文详细介绍了如何在Java中实现Car类的深度克隆，包括属性的复制、CarDriver类的实例化及scores数组的深拷贝。通过重写clone方法，确保了对象及其引用类型成员变量的完全独立。

Object的clone方法可以帮助我们克隆对象。现在需编写一个类Car包含:

1.属性:

private String name;
private CarDriver driver;
private int[] scores;

2.无参构造函数

public Car() {
}

3.方法:

@Override
public String toString() {
    return "Car [name=" + name + ", driver=" + driver + ", scores=" + Arrays.toString(scores) + "]";
}

setter/getter方法与clone方法。注意：clone方法需实现对象的深度克隆。

CarDriver为已经定义好的类,部分代码如下：

class CarDriver {
    private String name;
    public CarDriver() {}
    //setter/getter
    //toString	
}

/ 请在这里填写答案，即Car类的完整代码 /

class CarDriver {
    private String name;
    public CarDriver() {}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return "CarDriver [name=" + name + "]";
	}
    
}
class Car implements Cloneable{
//都是引用数据类型 得考虑深拷贝
	private String name;
	private CarDriver driver;
	private int[] scores;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public CarDriver getDriver() {
		return driver;
	}
	public void setDriver(CarDriver driver) {
		this.driver = driver;
	}
	public int[] getScores() {
		return scores;
	}
	public void setScores(int[] scores) {
		this.scores = scores;
	}
	public Car() {
	}
	@Override
	public String toString() {
	    return "Car [name=" + name + ", driver=" + driver + ", scores=" + Arrays.toString(scores) + "]";
	}
	@Override
	public Car clone() throws CloneNotSupportedException {
		Car car=new Car();
		CarDriver cd=new CarDriver();
		String nm;
		int []t;
		if(this.driver==null) {
			cd=null;
		}else {
			cd.setName(driver.getName());
		}
		car.setDriver(cd);
		if(this.name==null) {
			nm=null;
		}else {
			nm=name;
		}
		car.setName(nm);
		if(scores==null) {
			car.setScores(null);
		}else {
			t=Arrays.copyOf(scores, scores.length);
			car.setScores(t);
		}
		return car;
	}
}