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The_Lost_Avatar
The_Lost_Avatar

Reputation: 988

Check whether a string contains any member of the arrayList

This is a portion of the string

471 pfm9254-disk01_01                                       0           io_grp0       online 3            Chassis2_IBMi       100.00GB  striped 0     fcmap0                60050768028080EF6400000000001391 1            1          empty            0             no        0                     
472 IP10-32-41-70_SLES11SP2_10G                             0           io_grp0       online 0            pfm3079_pfm3128     10.00GB   striped                             60050768028080EF64000000000007CE 0            1          empty            0             no        0                     
473 pfm3128_pva1091_stgvios1                                0           io_grp0       online 1            VIOS_StgPool        35.00GB   striped                             60050768028080EF64000000000007D1 0            1          not_empty        0             no        0                     
474 vdisk64                                                 0           io_grp0       online 13           pfm9253_pfm9254_new 9.94GB    striped                             60050768028080EF6400000000001CC4 0            1          empty            0             no        0                     
475 vdisk65                                                 0           io_grp0       online 13           pfm9253_pfm9254_new 10.00GB   striped                             60050768028080EF6400000000001CC6 0            1          empty            0             no        0

I want to check whether it contains any members of my arrayList

I know I can iterate over the arrayList and then check for each element whether the string contains the element. I am looking for an efficient solution

This is my ArrayList

ArrayList<String> volIDsSent = new ArrayList<String>();
volIDsSent.add("60050768028080EF6400000000000AC3");
volIDsSent.add("60050768028080EF6400000000000FF8");

I would get the string from somewhere line by line .

Upvotes: 0

Views: 972

Answers (2)

asantaballa
asantaballa

Reputation: 4048

Consider reading the array once and building a regex string by concatenating with “|” between each one, either manually or with something like StringUtils.join. Then use the regex against each line to read.

Upvotes: 1

LionC
LionC

Reputation: 3106

If you want to check if one of the Strings in your ArrayList is a substring of your big String, you will have to iterate over the ArrayList and break if you find one occurence (if you really just want to know IF there is one ore more).

It cannot get more efficient because you need to check all of them as long as you havent found any occurence.

Upvotes: 0

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