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POBeginning Java Interface Program Collecting Strings and Printing
 

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  1. POBeginning Java Interface Program Collecting Strings and Printing
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    <p>I am trying to write a program that reads all words from user inputted scanner, puts them into an ArrayList calls a method, and prints a list of all the words that have a length of less than five. Yes, I can write this in a single program but the purpose of the assignment is to work with interfaces and inheritance. I wrote a program that loops user input into an array of objects. I wrote an interface (this cannot be changed), and i implemented a class which scans the words from the array and gives a boolean value depending on whether the word is less than five or more than five letters. I wrote a method that takes the answer from the class and creates a new ArrayList of objects. If the word is less than five letters then it is added to the array. I am trying to call the method into my main but i am getting a "Filters is abstract" " Cannot be instantiated" error...but my interface is not abstract? I have no idea how to fix it and its driving me crazy....Any help is much appreciated. Thank you!</p> <pre><code>public interface Filters { boolean accept(Object x); //this interface cannot be changed. } public class SWordFilter implements Filters { //This is my subclass for the interface public boolean accept(Object x) { String y =(String) x; boolean accept=false; if (y.length()&lt; 5) accept=true; return accept; } } import java.util.ArrayList; import java.util.Scanner; public class MyHomework { //this is my main and my method. I cannot call the method. public static void main(String[] args) { ArrayList&lt;Object&gt; names=new ArrayList&lt;Object&gt;(); Scanner in=new Scanner(System.in); int i=0; while(i&lt;5) { System.out.println("Enter the words"); names.add(in.next()); i++; } Filters tran= new Filters(names); Object result=collectAll(names,tran); } public static ArrayList&lt;Object&gt; collectAll (ArrayList&lt;Object&gt; list, Filters f) { ArrayList&lt;Object&gt; result= new ArrayList&lt;Object&gt;(); for (int x=0; x&lt;5; x++) { if (f.accept(list.get(x))) { result.add(list.get(x)); } else { System.out.print("the word is too long"); } //SWordFilter julie= new SWordFilter(); //System.out.print(julie.accept(names.get(j))); } return result; } } </code></pre>
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    1. USLindsay Baird
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