import java.util.regex.*;
import java.io.*;

public class MultipleFlag{
	public static void main(String[] args){
		String inputStr = "Abc\ndef";

		//Simply print the original string.
		System.out.println(inputStr);
		String patternStr = "\n";

		// Compile with multiline and case-insensitive enabled.
		Pattern pattern = Pattern.compile(patternStr, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(inputStr);

		//Finding new line and replacing with a tab.
		boolean matchFound = matcher.find();
		String str = matcher.replaceAll("\t");

		System.out.println(matchFound);
		System.out.println(str);

		//Split from where the new line character lies in the string.
		String[] strg = "Abc\ndef".split("\n");
		for (int i =0; i<strg.length; i++){
			System.out.print(strg[i] + " ");
		}
	}
}