Special characters needs to be escaped while providing them as delimeters like "." and "|".

      

public class Main {

  public static void main(String args[]) {
    String str = "one.two.three";
    String[] temp = str.split("\\.");
    for (String s: temp){
      System.out.println(s);
    }      
  }
}

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Special characters needs to be escaped while providing them as delimeters like "." and "|". : String split « Data Type « Java

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