parseCSV

import static java.util.Arrays.asList;

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

public class ParseCSV {
	 public static void main(String[] args) {

	 String input="John,                        Smith,                john.smith@gmail.com,        Los Angeles,                1\n" + 
	 		"Jane,                        Roberts,        janer@msn.com,                \"San Francisco, CA\",        0 \n" + 
	 		"\"Alexandra \"\"Alex\"\"\",        Menendez,        alex.menendez@gmail.com,        Miami,                        1\n" + 
	 		"\"Alexandra Alex\"";
	 ParseCSV pcsv = new ParseCSV();
	 System.out.println(pcsv.parseCSV(input));
	}
	 
	 public String parseCSV(String str) {
		 	List<String> res = new ArrayList<>();
		 	boolean inQuote = false;
		 	StringBuilder sb = new StringBuilder();
		 	for(int i = 0 ; i < str.length() ; i++) {
		 		if(inQuote) {
		 			if(str.charAt(i)=='\"') {
		 				if(i<str.length()-1&&str.charAt(i+1)=='\"') {
		 					sb.append("\"");
		 					i++;
		 				}else {
		 					inQuote= false;
		 				}
		 			}
		 			else {
		 				sb.append(str.charAt(i));
		 			}
		 		}else {
		 			if(str.charAt(i)=='\"') {
		 				inQuote=true;
		 			}
		 			else if(str.charAt(i)==',') {
		 				res.add(sb.toString());
		 				sb=new StringBuilder();
		 			}
		 			else {
		 				sb.append(str.charAt(i));
		 			}
		 		}
		 	}
		 	if(sb.length()>0) {
		 		res.add(sb.toString());
		 	}
		 
		    return String.join("|", res);
	 }
}