Help me making java program by Jcreator

Question

1. reversing an integer problem:
a. write a program that allows a user to enter an integer up to 4 digits in length. The program should then reverse the order of the integer. The new number should have it's full decimal value (e.g. 432 is really 3*100 + 2*10+ 1*1)
Enter number:123
The reversal is 321
Enter number:1005
The reversal is 5001

Answer 1

OK the specification said smth. about decimal extension, here it is:
EXPLANATION:
I am just a 'medium-advanced' Java programer and do this because I wan't to
write more code and gather experience.
And if I just write code but don't show it to any body it would get wasted...
OK , ok now on I Stop helping Trolls and laymen.
* @author melhiah
public class ReverseAnInteger {
    private static final int MAX_INT_LEN = 6;
    public static void main(String[] args) throws Exception {
/*        if(args.length < 1) {
            System.out.println("Usage: java ReverseAnInteger <integer-value>");
            System.exit(0);
        //String parsedIntegerString = args[0].substring(0, MAX_INT_LEN);
        String testIntegerString = "1234567890";
        String parsedIntegerString;
        if(testIntegerString.length() < MAX_INT_LEN) {
            parsedIntegerString = testIntegerString.substring(0,
                    testIntegerString.length());
        } else {
            parsedIntegerString = testIntegerString.substring(0, MAX_INT_LEN);
        String reversedIntegerString = showDecimalExtension(
                reverseInt(parsedIntegerString));
        System.out.println(reversedIntegerString);
    private static String reverseInt(String intString) {
        char[] charString = intString.toCharArray();
        char[] resultString = new char[charString.length];
        int top = charString.length;
        for(int i = 0; i < charString.length; i++) {
            resultString[i] = charString[--top];
        return new String(resultString);
    private static String showDecimalExtension(String intString) {
        StringBuffer buffer = new StringBuffer();
        StringBuffer sb = new StringBuffer(); sb.append("1");
        for(int i = 1; i < intString.length(); i++) {
            sb.append("0");
        String decim = sb.toString();
        for(int i = 0; i < intString.length(); i++) {
            String str = intString.charAt(i) + "*" + decim + " + ";
            decim = decim.substring(0, decim.length() -1);
            buffer.append(str);
        String result = buffer.substring(0, buffer.length() -3); // to get rid of the trailing '+'
        return result;
}