Hi, I have two homework questions for JAVA that I am stuck on and I was wonderin

Question

Hi, I have two homework questions for JAVA that I am stuck on and I was wondering if anyone can help me out, thanks! The first question wants me to write a static method that inputs an array of ints p and a String s. For each of the ints n in p, the method builds the substring consisting of the first n characters in s (or the whole of s, if n is greater than the length of s). The method returns the array of these substrings.

For example: stringHeads( new int[] { 3, 2, 5, 52, 0 }, "seventeen" ) returns the String array { "sev", "se", "seven", "seventeen", "" }.

The second question would be to write a static method called bothStart that allows the user to input two Strings and returns the String that is the longest substring s such that both inputs start with s.

For example,

bothStart( "radar dish", "radical food" )   returns   "rad"

bothStart( "radar disk", "disk radar" ) returns   ""

bothStart( "radar installation", "" )   returns   ""

bothStart( "Mendacious", "Mendicant" ) returns "Mend"

bothStart( "FRANKLY", "frank" )   returns ""

Can you please help me write the code out with comments so I can study it? thanks!

Explanation / Answer

class substr
{
   public static void main(String args[])
   {
       int a[]={3,2,5,52,0},i;
       String str[] = new String[5];
       for(i=0;i<5;i++)
       {
       str[i]=stringHeads(a[i], "seventeen");
       }
       //int i;

       for(i=0;i<5;i++)
       {
           System.out.println(str[i]);
       }      
   }

   public static String stringHeads(int a ,String s)
   {
       String ss[]=new String[5];
       int i;
      
           if (a>s.length())
               a=s.length();
           return s.substring(0,a);
      
       //return ss;
   }

}
      

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