converting string array to arraylist in java code example

Example 1: java arraylist to string

ArrayList<String> al = new ArrayList<String>();
      al.add("Hello");
      al.add("Wor");
      al.add("ld");
      StringBuffer sb = new StringBuffer();
      
      for (String s : al) {
         sb.append(s);
         sb.append(" ");
      }
      String str = sb.toString();
      System.out.println(str);//"Hello wor ld"

Example 2: convert string to arraylist

import java.util.ArrayList;
import java.util.List;
import java.util.Arrays;
public class JavaExample {
    public static void main(String args[]){
	String num = "22,33,44,55,66,77";
	String str[] = num.split(",");
	List<String> al = new ArrayList<String>();
	al = Arrays.asList(str);
	for(String s: al){
	   System.out.println(s);
	}
   }
}