I need help with this assignment, I did some of it and it stuck on it, is there anyone can help me out with explain please.

I don't know how to write the test case because I don't even know did I did right in this part ....

a. Create a class called Battery containing a battery number (as a unique identifier) of type int, a manufacturer of type String, and expiration date of type Date. Make it cloneable and implement its toString( ) method.

b. Create a class called Toy that contains a name of type String, and an array of Battery and a toString( ) method that prints out info about all its batteries. Write a clone( ) for Toy that automatically clones its name and all of its Battery objects.

c. Make sure that the clone( ) methods catch the CloneNotSupportedException rather than passing it to the caller, as shown in the Textbook.

d. Write test methods only for the clone( ) methods that will do the cloning and print out the input parameter(s), expected results, and actual results. Choose 2-3 appropriate inputs to validate that they perform deep cloning (and not do shallow cloning.)

Here is what I got right now.

import java.util.Date;

import java.util.GregorianCalendar;

public class Battery implements Cloneable {

private Date ExpireDate;

private String name;

private int battery;

public Battery(String name, int battery) {

this.name = name;

this.battery = battery;

ExpireDate = new Date();

}

public Battery clone() throws CloneNotSupportedException {

Battery cloned = (Battery) super.clone();

cloned.ExpireDate = (Date) ExpireDate.clone();

return cloned;

}

public void setExpireDate(int year, int month, int Day) {

Date newExpireDate = new GregorianCalendar(year, month - 1, Day).getTime();

ExpireDate.setTime(newExpireDate.getTime());

}

public String toString() {

return name;

}

}