Converting from integers to roman numerals

Question

i'm new to the whole programming scene, so I've been working with a few practice programs. I've got this one extremely close to working, but the compiler still gives me one error, and it completely baffles me. here's the code:
package practiceprograms;
import java.io.*;
public class RomanNumerals {
     //ButtonCreator c = new ButtonCreator(); //uncomment at start of line to implement GUI and all other full line comments too.
     public static void main(String[] args) {
          //console.run(new ButtonCreator(), 200, 100);
          Numerals.removeNumbers(String number, int i);
class Numerals {
     static void removeNumbers(String s, int x) {
          GetNumber b = new GetNumber();
          while (x != 0){
               b.getInput(x);
               if (x < 0) {
                    x = -x;
                    s += "Negative ";
               for(; x>=1000; x -= 1000) {
                    s += "M";
               for(; x>=100; x -= 100) {
                    s += "C";
               for(; x>=50; x -= 50) {
                    s += "L";
               for(; x>=10; x -= 10) {
                    s += "X";
               for(; x>=5; x -= 5) {
                    s += "V";
               for(; x>=1; x--) {
                    s += "I";
          //if (i = null)
          //     c.actionPerformed();
          System.out.println(s);
               //txt.setText(s);
class GetNumber {
     int getInput(int x) throws IOException {
          System.out.println("Please enter a non-zero number between -10000 and 10000. If you enter zero, the program will quit.");
          System.out.println("Return a blank line or zero to quit the program.");
          BufferedReader in = new BufferedReader(
               new InputStreamReader(System.in));
          x = in.readline();
          GetNumber.getInput(x);
        return x;
     int checkI(int t) {
          if (t > 10000 | t < -10000) {
               System.out.println("Err: Please enter a non-zero number between -10000 and 10000.");
               GetNumber n = new GetNumber();
               n.getInput();
               n.checkI(i);
               return i;
          else
               return t;
} and the error it gives me:
C:\Documents and Settings\Aishu\Desktop\java class and source files\RomanNumerals.java:8: ')' expected
Numerals.removeNumbers(String number, int i);
^
1 error
its irritating, because its almost saying that the method removeNumbers shouldn't take any arguments... or atleast thats what it seems like to me... any ideas as to what the problem is?

Answer 1

hmm... well i recompiled, and reran the program (i'm using JCreator LE to write, compile, and run the programs.) and it gave me a new error... a more descriptive one, but i'm not too sure what it means. I can't copy and paste, but i'll type it into here:
"Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.NullPointerException
at comararjun.RomanNumerals.<init>(RomanNumerals.java: 106)
at comararjun.GetNumber.<clinit>(RomanNumerals.java:9)
Press any key to continue..."
here's the code:
package comararjun;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
class GetNumber {
          static RomanNumerals r = new RomanNumerals();     
/*line 9*/ static int getInput(int x) throws IOException {
          P.rintln("Please enter a non-zero number between -10000 and 10000.");
          P.rintln("Enter a zero to exit.");
          P.rintln();
          BufferedReader in = new BufferedReader(
               new InputStreamReader(System.in));
          x = Integer.parseInt(in.readLine());
          //System.out.println(x);
          //checkI(x);
          //System.out.println(x);
return x;
//     static int checkI(int t) {
//          if (t > 10000 || t < -10000) {
//               RomanNumerals.r.setText("Err: Please enter a non-zero number between -10000 and 10000.");
//               RomanNumerals.i = Integer.parseInteger(romanNumber.getText());
//               //P.rintln("Err: Please enter a non-zero number between -10000 and 10000.");
//               //GetNumber n = new GetNumber();
//               //try{
//               //     n.getInput(t);
//               //} catch(IOException p) {
//               //     System.out.println("Error: Wrong input type. Please enter another number.");
//               //     Numerals.removeNumbers(RomanNumerals.number,RomanNumerals.i);
//          //     System.out.println(t);
//               checkI(RomanNumerals.i);
//               return RomanNumerals.i;
//          else
//          //     System.out.println(t);
//               return t;
class Numerals {
     public static String removeNumbers(String s, int x) {
               if (x < 0) {
                    x = -x;
                    s += "Negative ";
               for(; x >= 1000; x -= 1000) {
                    s += "M";
               for(; x >= 900; x -= 900) {
                    s += "CM";
               for(; x >= 500; x -= 500) {
                    s += "D";
               for(; x >= 400; x -= 400) {
                    s += "CD";
               for(; x >= 100; x -= 100) {
                    s += "C";
               for (; x >= 90; x -= 90) {
                    s += "XC";
               for(; x >= 50; x -= 50) {
                    s += "L";
               for (; x >= 40; x -= 40) {
                    s += "XL";
               for(; x >= 10; x -= 10) {
                    s += "X";
               for (; x >= 9; x -= 9) {
                    s += "IX";
               for(; x >= 5; x -= 5) {
                    s += "V";
               for(; x >= 4; x -= 4) {
                    s += "IV";
               for(; x >= 1; x--) {
                    s += "I";
          //if (i == 0)
          //     c.actionPerformed();
               return s;
               //txt.setText(s);
public class RomanNumerals extends JApplet implements ActionListener {
     static String number = "";
     static int i;
     JFrame converterFrame;
     JPanel converterPanel;
     JTextField romanNumber;
     JLabel intLabel, romanLabel;
     JButton convertNumber;
     public RomanNumerals() {
          /*line 106*/converterFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          converterFrame.setSize(new Dimension(120, 40));
          converterPanel = new JPanel(new GridLayout(2, 2));
          addWidgets();
          converterFrame.getContentPane().add(converterPanel, BorderLayout.CENTER);
          converterFrame.pack();
          converterFrame.setVisible(true);
     private void addWidgets() {
          romanNumber = new JTextField(2);
          intLabel = new JLabel("Integer", SwingConstants.LEFT);
          convertNumber = new JButton("Convert");
          romanLabel = new JLabel("Roman Numeral value.");
          convertNumber.addActionListener(this);
          converterPanel.add(romanNumber);
          converterPanel.add(intLabel);
          converterPanel.add(convertNumber);
          converterPanel.add(romanLabel);
          intLabel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
          romanLabel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
     GetNumber k = new GetNumber();
     Numerals l = new Numerals();
     private static void createGUI() {
          JFrame.setDefaultLookAndFeelDecorated(true);
          RomanNumerals converter = new RomanNumerals();
     public void actionPerformed(ActionEvent event) {
          i = (int)(Double.parseDouble(romanNumber.getText()));
     //     i = GetNumber.checkI(i);
          romanNumber.setText(Numerals.removeNumbers(number, i));
     static void numberIs() {
          do {
               try {
                    i = GetNumber.getInput(i);
                    //System.out.println(i);
                    Numerals.removeNumbers(number, i);
               } catch(IOException p) {
                    System.out.println("Error: Wrong input type. Please enter another number.");
                    numberIs();
               } catch(NumberFormatException t) {
                    System.out.println("Error: Wrong input type. Please enter another number.");
                    numberIs();
          } while(i != 0);
     public static void main(String[] args) {
          javax.swing.SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    createGUI();
}