queueMystery1

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< stackMystery1

collectionMystery3 >

Main Page → Exercises → Java → Solve an Exercise

Language/Type: Java Stack collections

What is the output of the following code?

Queue<Integer> queue = new LinkedList<Integer>();
for (int i = 1; i <= 6; i++) {
    queue.add(i);
}                             // {1, 2, 3, 4, 5, 6}

for (int i = 0; i < queue.size(); i++) {
    System.out.print(queue.remove() + " ");
}
System.out.println(queue + "  size " + queue.size());

`output`
`1 2 3 4 5 6 {} size 0` `1 2 3 {4, 5, 6} size 3` `1 2 3 4 5 6 {1, 2, 3, 4, 5, 6} size 6` `other`

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