CODEWITHSUNDEEP
java
jay
jay

Reputation: 1524

How do I get a Java Set to iterate in the same order every time?

Is there any way that I can get a Java Set object (not a SortedSet) to iterate over its elements in the same order every time that I run the program. (The elements are the same for each run.) I am trying to debug my program but I'm having trouble reproducing my error because the iterator returns the values in a different order each time. Thanks.

Upvotes: 3

Views: 1836

Answers (2)

Michael Borgwardt
Michael Borgwardt

Reputation: 346377

LinkedHashSet iterates in insertion order.

See the javadocs for more information: https://docs.oracle.com/javase/8/docs/api/java/util/LinkedHashSet.html

Upvotes: 5

Garrett Hall
Garrett Hall

Reputation: 30032

Use a LinkedHashSet and the iteration order should be the same (it is just a HashSet backed by a LinkedList).

Upvotes: 2

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