30 lines
859 B
Java
30 lines
859 B
Java
// collections/QueueDemo.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Upcasting to a Queue from a LinkedList.
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import java.util.*;
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public class QueueDemo {
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public static void printQ(Queue queue) {
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while(queue.peek() != null)
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System.out.print(queue.remove() + " ");
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System.out.println();
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}
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public static void main(String[] args) {
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Queue<Integer> queue = new LinkedList<>();
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Random rand = new Random(47);
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for(int i = 0; i < 10; i++)
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queue.offer(rand.nextInt(i + 10));
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printQ(queue);
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Queue<Character> qc = new LinkedList<>();
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for(char c : "Brontosaurus".toCharArray())
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qc.offer(c);
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printQ(qc);
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}
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}
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/* Output:
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8 1 1 1 5 14 3 1 0 1
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B r o n t o s a u r u s
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*/
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