String.split() is based on regular expression : String Split « Data Type « Java Tutorial

public class Main {
  public static void main(String args[]) throws Exception {
    String s3 = "{A}{this is a test}{1234}";
    String[] words = s3.split("[{}]");
    for (String str : words) {
      System.out.println(str);
    }
  }
}
/*
A

this is a test

1234
*/

2.32.String Split
	2.32.1.	Split string
	2.32.2.	Split a String
	2.32.3.	Using split() with a space can be a problem
	2.32.4.	" ".split(" ") generates a NullPointerException
	2.32.5.	String.split() is based on regular expression
	2.32.6.	String split on multicharacter delimiter
	2.32.7.	Split by dot
	2.32.8.	Split up a string into multiple strings based on a delimiter
	2.32.9.	Splits a string around matches of the given delimiter character.
	2.32.10.	Splits the provided text into an array, separator string specified. Returns a maximum of max substrings.
	2.32.11.	Splits the provided text into an array, using whitespace as the separator, preserving all tokens, including empty tokens created by adjacent separators.