Find the sequence in the String matches the items in the List

Suppose I have a list and then I add names to the list

List<String> listOfName = new ArrayList();
listOfName.add("abc");
listOfName.add("pqr");
listOfName.add("xyz");

And I have a String String names = "abc\r\npqr\r\nxyz";

I want to verify that the string is comprised in the same order as the elements in the list are.

eg: abc should come first then pqr and then xyz

What I am trying to do:

int flag = 1;
for(int i=0; i<listOfName.size()-1;i++){
    if(names.replace("\r\n","").split(listOfName.get(i))[1].indexOf(listOfName.get(i+1))!=0){
        flag = 0;
        break;
    }
}
if(flag==1){
    System.out.println("True");
} else {
    System.out.println("False");
}

Is there any better solution for doing the same as I doubt that it might fail in some scenarios

You can utilize String.join for this purpose by creating a String from the list of items and put a (Windows-) linebreak (\r\n) as delimiter. Then check if it is equal to the String names, like this:

public static void main(String[] args) {
	List<String> listOfName = new ArrayList<>();
	listOfName.add("abc");
	listOfName.add("pqr");
	listOfName.add("xyz");
	
	String names = "abc\r\npqr\r\nxyz";
	
	//  create a linebreak-separated String from the items of the list
	String listItems = String.join("\r\n", listOfName);

	/*
	 *  and compare it to the String that might contain those items
	 *  in the order they appear in the list 
	 */
	if (listItems.equals(names)) {
		System.out.println(listItems + "\r\n== equals ==\r\n"+ names);
	} else {
		System.err.println(listItems + "\r\n!= is not equal to !=\r\n" + names);
	}
}

This outputs

abc
pqr
xyz
== equals ==
abc
pqr
xyz

Well, there is certainly a more "abstract" and semantically pretty way to do this:

public class CompareList {

    public static void main(String[] args) {
    	List<String> listOfNames = new ArrayList<String>();
    	listOfNames.add("abc");
    	listOfNames.add("pqr");
    	listOfNames.add("xyz");
    	
    	String names = "abc\r\npqr\r\nxyz"; // define string
    	boolean match = checkList(listOfNames, names, "\r\n"); //check match
    	System.out.println(match); //print match
    }
    
    private static boolean checkList(
    		List<String> list,
    		String content,
    		String delimiter) {
    	
    	return Arrays.asList(
    			content.split(Pattern.quote(delimiter))).equals(list);
    }
    
}

This will print true.

Here you have method checkList() (or whatever name you like) that splits the string using the given delimiter (\r\n in your case), turns the resulting array into a List and just calls equals() on it to compare it with the input List, as the equals() implementation of List (i quote) "Returns true if and only if the specified object is also a list, both lists have the same size, and all corresponding pairs of elements in the two lists are equal.".

Using Java 8

String names = listOfName.stream().collect(Collectors.joining("\r\n"));

Documentation of Collectors.joining -

> Returns a Collector that concatenates the input elements, separated by
> the specified delimiter, in encounter order.

Try this.

List<String> listOfName = new ArrayList<>();
listOfName.add("abc");
listOfName.add("pqr");
listOfName.add("xyz");
String names = "abc\r\npqr\r\nxyz";
System.out.println(String.join("\r\n", listOfName).equals(names));

output

true

You can convert the list into an array and then use Arrays.equals to compare it with the array obtained after splitting the string on \r\n.

Demo:

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main {
	public static void main(String[] args) {
		List<String> listOfName = new ArrayList<>();
		listOfName.add("abc");
		listOfName.add("pqr");
		listOfName.add("xyz");

		String names = "abc\r\npqr\r\nxyz";
		String[] namesArr = names.split("\r\n");

		System.out.println(Arrays.equals(namesArr, listOfName.toArray()));
	}
}

Output:

true

A working example here:

import java.util.List;
import java.util.ArrayList;


class Main {
  public static void main(String[] args) {
    List<String> listOfName = new ArrayList();
    listOfName.add("abc");
    listOfName.add("pqr");
    listOfName.add("xyz");

    String names = "abc\r\npqr\r\nxyz";
    String[] splitted_names = names.split("\r\n");

    boolean noNameFound = true;
    for (String name : splitted_names) {
      if (listOfName.contains(name)) {
        System.out.println("Found name " + name + " in listOfName! ");
        noNameFound = false;
      } 
    }
    if (noNameFound) {
          System.out.println("No name found that matched");
    }

  }
}