Java - PatternSyntaxException

Java - PatternSyntaxException
Java - PatternSyntaxException

PatternSyntaxException is a Runtime Java Exception that you may get while dealing with Regular Expressions in your program that is incorrect. Please make sure that your expression is valid.

public static void main(String[] args) {

	String dataString = "";
	String[] dataStringArr = dataString.split("${\\.}");
	for (String data : dataStringArr) {

Output Error Stack Trace:
Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 1
	at java.base/java.util.regex.Pattern.error(
	at java.base/java.util.regex.Pattern.closure(
	at java.base/java.util.regex.Pattern.sequence(
	at java.base/java.util.regex.Pattern.expr(
	at java.base/java.util.regex.Pattern.compile(
	at java.base/java.util.regex.Pattern.<init>(
	at java.base/java.util.regex.Pattern.compile(
	at java.base/java.lang.String.split(
	at java.base/java.lang.String.split(

The correct expression syntax here should be "\\." making sure to escape the dot with slashes.

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