Try this Overload the Queue constructor

• The project aims to improve the Queue class by adding two new constructors.

• The first builder will create a new queue from another existing queue.

• The second constructor will allow you to create a queue with initial values.

• These constructors significantly improve the usability of the Queue class.

1 Create a file called QDemo2.java and copy the updated Queue class from the Try This 6-1 section into it.

2 First, add the following constructor, which builds one queue from another.

// Builds a queue from another.
Queue(Queue ob) {
putloc = ob.putloc;
getloc = ob.getloc;
q = new char[ob.q.length];
// copy elements
for(int i=getloc; i < putloc; i++)
q[i] = ob.q[i];
}

The constructor initializes putloc and getloc with values ​​from an ob object. Allocates a new array to the queue and copies the elements of ob to this new array. The new queue will be an identical copy of the original, but it will be a separate and independent object.

3 Now, add the constructor that initializes the queue from a character array, as shown here:

// Builds a queue with initial values.
Queue(char a[]) {
putloc = 0;
getloc = 0;
q = new char[a.length];
for(int i = 0; i < a.length; i++) put(a[i]);
}

This constructor creates a queue large enough to contain the characters to and then stores them in the queue.

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