Question

Write a method will accept an array of Strings. This method should return the string that comes after all the other strings in lexicographical order.
(Assume all the Strings only contain lower case letters. In Example: No number, no Capitals and no Symbols)

lastString({“hola”, “word”, “night”, “boom”}) → “word”
lastString({“java”, “is”, “so”, “much”, “fun”}) → “so”
lastString({“i”, “love”, “java”}) → “love”

//precondition: words.length >0
public static String lastString(String[] words)
{

}

Answer 1

public class Main
{
//precondition: words.length >0
public static String lastString(String[] words)
{
//RETURNS THE LAST STRING IN LEXICOGRAPHIC ORDER
String last = words[0];
for(int i=0;i<words.length;i++){
if(last.compareTo(words[i])<0)//updating if current word comes after last word
last=words[i];
}
return last;
}
   public static void main(String[] args) {
   //testing above method
       System.out.println(lastString(new String[]{"hola", "word", "night", "boom"}));
       System.out.println(lastString(new String[]{"java", "is", "so", "much", "fun"}));
       System.out.println(lastString(new String[]{"i","love","java"}));
   }
}

output:

word
so
love

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//if you have any doubts, ask me in the comments