The following program demonstrates the queue of integers:

//the program demonstrates a queue used to store integers (int)

public class ShowIntQueue {
	public static void main(String [] args) {
	    // creating a new queue
		IntQueue iq = new IntQueue();
		// a variable to store integers taken off the queue
		int n;

		iq.enqueue(2);
		iq.enqueue(3);
		n = iq.dequeue();
		System.out.println("n = " + n);
		iq.enqueue(4);
		iq.enqueue(5);

		while( !iq.isEmpty()) {
		    n = iq.dequeue();
		    System.out.print(n + " ");
		}
		System.out.println(); // new line
	}
}

Fill in the code in the program below. You have a queue of packages (the numbers respresent weight) and the capacity of the truck. Test your program with different number and sizes of packages and different truck capacity.

public class Packages {
public static void main(String [] args) {
	// creating a new queue
	IntQueue packages = new IntQueue();
	    
	    // storing some elements
	    packages.enqueue(2);
	    packages.enqueue(1);
	    packages.enqueue(5);
	    packages.enqueue(3);
	    packages.enqueue(4);
	    packages.enqueue(2);
	    
	    int capacity = 10;
	    
	    // your code goes here:

	    // At the end print the queue to test
	    while (!packages.isEmpty()){
	    int item = packages.dequeue();
	    	System.out.println(item);
	    }
	}
}