TestIntegers.java

public class TestIntegers {

    /**
    *   Program:    TestIntegers.java
    *   Purpose:    Remove non-integer tokens from a string.
    *   Creator:    Chris Clarke
    *   Created:    13.01.2015
    */

    public static boolean findError(String token) {
        int n;
        boolean error=false;
        try {
            n = Integer.parseInt(token);
        } catch (NumberFormatException e) {
            error=true;
        } // try..catch
        return error;
    } // test

    public static void main(String[] args) {
        String testString = "1 2 three 4 5 6 seven 8 9 10";
        String result = "";
        String[] theStrings = testString.split(" ");
        int errorCount=0;
        for (String s: theStrings) {
            if (findError(s)) {
                System.out.println(s + " is not a number.");
                errorCount++;
            } else {
                System.out.println(s + " is a number.");
                result += s+" ";
            } // if
        } // for
        System.out.println("In the string \"" + testString + "\",");
        System.out.println("there were "+errorCount+" items which were not numbers.");
        System.out.println("They've been removed: "+result);
    } // main()

} // class TestIntegers