How can I use "." as the delimiter with String.split() in java

Question

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Answer 1

String.split takes a regex, and '.' has a special meaning for regexes.

You (probably) want something like:

String[] words = line.split("\.");

Some folks seem to be having trouble getting this to work, so here is some runnable code you can use to verify correct behaviour.

import java.util.Arrays;

public class TestSplit {
  public static void main(String[] args) {
    String line = "aa.bb.cc.dd";
    String[] words = line.split("\.");
    System.out.println(Arrays.toString(words));
    // Output is "[aa, bb, cc, dd]"
  }
}