How to add or insert ' (single quotes) for every string in a list in which strings are separated by commas using Java

Question

I have a list as below

[url1,url2,url3,url4] 

This list will be based on multiple selection from drop down list of HTML. So list size i.e., lis

Answer 1

You can use Java 8 utility class java.util.StringJoiner.

This class specifically introduced to format list of string values.

For example:

StringJoiner joiner = new StringJoiner("','", "'", "'");
        joiner.add("url1");
        joiner.add("url2");
        joiner.add("url3");
        joiner.add("url4");
        System.out.println(joiner);

Output

'url1','url2','url3','url4'

Note that, in constructor of StringJoiner,

StringJoiner(CharSequence delimiter, CharSequence prefix, CharSequence suffix)

we are passing single quote as prefix and suffix to satisfy your specific requirement.