Write a method f that accepts an ArrayList containing String

Write a method  f that accepts an ArrayList containing String  objects . The method should return a String  containing the first character of each string in the ArrayList, in the order in which they appear. Thus, if the ArrayList contains the Strings : Hello world goodbye the return value of the method would be the String  Hwg

Solution

ArrayListCheck.java

import java.util.ArrayList;

public class ArrayListCheck {

   public static void main(String[] args) {
       ArrayList<String> list = new ArrayList<String>();
       list.add(\"Hello\");
       list.add(\"world\");
       list.add(\"goodbye\");
       String returnStr = stringFirstLetters(list);
       System.out.println(\"The first character of each string in the ArrayList: \"+returnStr);
      
   }
   public static String stringFirstLetters(ArrayList<String> list){
       String s = \"\";
       for(String str: list){
           s = s + str.charAt(0);
       }
       return s;
   }
}

Output:

The first character of each string in the ArrayList: Hwg