Case insensitive String split() method

Question

When I perform

String test=\"23x34 \";
String[] array=test.split(\"x\"); //splitting using simple letter

I got two items in array as 23 and

Answer 1

Use regex pattern [xX] in split

String x = "24X45";
String[] res = x.split("[xX]");
System.out.println(Arrays.toString(res));