java - How to remove similar named strings in a list? -

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given list/array of strings:

document document (1) document (2) document (3) mypdf (1) mypdf myspreadsheet (1) myspreadsheet myspreadsheet (2)

how remove duplicates retain highest copy number?

ending result be:

document (3) mypdf (1) myspreadsheet (2)

you put in broad question, here comes unspecific (but nonetheless) "complete" answer:

  1. iterate on strings identify lines contain braces.
  2. in other words: identify strings "x (n)"
  3. then, each "different" x found, can iterate list again; can find occurrences of "x", x (1)", .. , on
  4. doing allow detect maximum n each of xes.
  5. push "maximum" "x (n)" results list.

in other words: takes such simple receipt solve problem; takes time turn these pseudo-code instructions real code.

for record: if layout of file shown above, things become bit easier - seems numbers increasing. mean is: 

x (1) x (2) x (3)

is easier treat than

x (1) x (3) x (2)

as in case, seems save assume last x(n) contains largest n. makes using hashmap (as suggested cainiaofei) nice solution.


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