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Thread: reading file into a hashmap?

  1. #1
    Junior Member
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    Default reading file into a hashmap?

    hi out there.
    i have a question of course, i have.
    i need to parse a textfile. this file contains the following:

    string1 = 1,2,3,4
    string2 = 22,56,77

    and so on. what i need first is the following:
    get every string and number and put that into a hashmap. can i use an array as the values for the key "string"?
    what is really intended is the following: i have to a call an external program that gets the arrays as attributes.
    "external_program -param string1=1 -param string2=22" and so on for every string.
    next loop would be in this example "external_program -param string1=1 -param string2=56" so to iterate *every* combination of the values of the arrays. and i don't know how many times the term "string =" will appear. how do i do that in java?!

  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Oct 2010
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    Default Re: reading file into a hashmap?

    Are you just asking how to iterate over a Map? If so, check out the API- there is a method that returns a set that contains all of the keys, and there is a method that returns the mapped value of a key.
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  3. #3
    Super Moderator Json's Avatar
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    Default Re: reading file into a hashmap?

    If you want to load a properties file like that have a look at Properties (Java Platform SE 6)

    // Json

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