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Thread: what is ... (triple dot) operator

  1. #1
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    Default what is ... (triple dot) operator

    What is the use of ... (triple dot operator)

    for Example please explain below code :

    public PausableThreadPoolExecutor(...) { super(...); }

    From which JDK version it was introduced.. ?

  2. #2
    Administrator copeg's Avatar
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    Default Re: what is ... (triple dot) operator

    Do an internet search for the term "java varargs" for java specific info, or "programming ellipsis" for a more general description. Lots of info, for instance, the following link:

  3. #3
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    Default Re: what is ... (triple dot) operator

    That feature is called varargs, and it's a feature introduced in Java 5. It means that function can receive multiple String arguments:
    The parameter that gets the ... must be the last in the method signature.
    public void myMethod(String... strings){
    for(String whatever : strings)


  4. #4

    Default Re: what is ... (triple dot) operator

    The spread operator allows you to expand an expression in places where you would expect multiple arguments (in functions) or multiple elements (in arrays).

    let someArguments = ['hi','bye'];

    function logArgs (arg1, arg2) {
    return console.log(`${arg1} ${arg2}`);

    logArgs(...someArguments); //hi bye

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