Purse

The Purse class allows for the management of a collection of coins. The names of the coins in the purse will be kept in an ArrayList<String>. This first version of the Purse class includes a constructor which creates an empty purse object, the mutator method addCoin(String newCoin) which adds a coin to the purse, and a toString() method that returns a string displaying the contents of the purse in the format
```
 Purse[Quarter,Dime,Nickel,Dime]
```
Add to the Purse class the mutator method reverse() which reverses the sequence of coins in a purse. For example, if reverse() is called with a purse
```
 Purse[Quarter,Dime,Nickel,Dime]  
```
the purse will now be:
```
 Purse[Dime,Nickel,Dime,Quarter]
```
Add a method to the Purse class
```
 transfer(Purse other)   
```
that transfers the contents of one purse to another. For example, if myPurse is
```
 Purse[Quarter,Dime,Nickel,Dime]
```
and yourPurse is
```
 Purse[Dime,Nickel]
```
then after the call myPurse.transfer(yourPurse), myPurse is
```
 Purse[Quarter,Dime,Nickel,Dime,Dime,Nickel] 
```
and yourPurse is empty.
Write a boolean method for the Purse class
```
 sameOrder(Purse other)
```
that checks whether the other purse has the same coins, in the same order, as this one.
Write a boolean method for the Purse class
```
 sameCoins(Purse other)
```
that checks whether the other purse has the same coins, perhaps in a different order. For example, the purses
```
 Purse[Quarter,Dime,Nickel,Dime]
```
and
```
 Purse[Nickel,Dime,Dime,Quarter]
```
should be considered equal. You may wish to write a helper methods or two to assist in analyzing this situation.