import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(\\S+.\\n)\\n(?=Contact)";
final String string = " Invoice\n\n"
+ "CK DEF Pvt ltd Invoice Number: 14523687\n"
+ " Account: Karnataka Bank\n"
+ " Account Number: 42568965113124\n\n"
+ " Date: 03-08-2021\n\n"
+ "Company: PRENDON RICARD AUST (WINE) 705328\n"
+ "Email: Cherrychethan22@gmail.com\n"
+ "From: Australia PTY LTD\n\n\n\n"
+ "Store# Name and address of the store\n\n"
+ "3456 LX WORD SQUARE\n"
+ " 650 gorge SP\n"
+ " Bangalore\n"
+ " 573102\n\n"
+ "Contact Ph: 2 35 633 125 568\n"
+ "Purchase order number: 12345678\n"
+ "Liquor License: LIPQ274013486\n\n"
+ "Item Description UOM Qty Size Prize\n"
+ "258947561237 Str huge barrel 7500 ml CARTOM 1 7500 133.15\n"
+ "986452137954 Str HUGO Chardony 750 ml CARTOM 1 750 11.4\n\n";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html