Ok...I am really stumped by this...(Please Help!)

Question

I am new to Dev. Conn. and to programming in Java. I am working on a project for school. I have written this test application to take Morse Code input from a JOptionPane and output the corresponding letters to System.out --- but it does not work. It compiles and accepts input but then just freezes up. Can someone please help? I am not looking for you to do it for me just help me to understand what I am doing wrong. Thank you in advance.
Program Code:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class ArrayTest extends Object
     public static void main(String args[])
          String langKey[] = new String[36];
          String cipherKey[] = new String[36];
          langKey[0] = "A";
          langKey[1] = "B";
          langKey[2] = "C";
          langKey[3] = "D";
          langKey[4] = "E";
          langKey[5] = "F";
          langKey[6] = "G";
          langKey[7] = "H";
          langKey[8] = "I";
          langKey[9] = "J";
          langKey[10] = "K";
          langKey[11] = "L";
          langKey[12] = "M";
          langKey[13] = "N";
          langKey[14] = "O";
          langKey[15] = "P";
          langKey[16] = "Q";
          langKey[17] = "R";
          langKey[18] = "S";
          langKey[19] = "T";
          langKey[20] = "U";
          langKey[21] = "V";
          langKey[22] = "W";
          langKey[23] = "X";
          langKey[24] = "Y";
          langKey[25] = "Z";
          langKey[26] = "0";
          langKey[27] = "1";
          langKey[28] = "2";
          langKey[29] = "3";
          langKey[30] = "4";
          langKey[31] = "5";
          langKey[32] = "6";
          langKey[33] = "7";
          langKey[34] = "8";
          langKey[35] = "9";
          cipherKey[0] = ".-";
          cipherKey[1] = "-...";
          cipherKey[2] = "-.-.";
          cipherKey[3] = "-..";
          cipherKey[4] = ".";
          cipherKey[5] = "..-.";
          cipherKey[6] = "--.";
          cipherKey[7] = "....";
          cipherKey[8] = "..";
          cipherKey[9] = ".---";
          cipherKey[10] = "-.-";
          cipherKey[11] = ".-..";
          cipherKey[12] = "--";
          cipherKey[13] = "-.";
          cipherKey[14] = "---";
          cipherKey[15] = ".--.";
          cipherKey[16] = "--.-";
          cipherKey[17] = ".-.";
          cipherKey[18] = "...";
          cipherKey[19] = "-";
          cipherKey[20] = "..-";
          cipherKey[21] = "...-";
          cipherKey[22] = ".--";
          cipherKey[23] = "-..-";
          cipherKey[24] = "-.--";
          cipherKey[25] = "--..";
          cipherKey[26] = "-----";
          cipherKey[27] = ".----";
          cipherKey[28] = "..---";
          cipherKey[29] = "...--";
          cipherKey[30] = "....-";
          cipherKey[31] = ".....";
          cipherKey[32] = "-....";
          cipherKey[33] = "--...";
          cipherKey[34] = "---..";
          cipherKey[35] = "----.";
          String input ="";
          String output = "";
          int s = 0;
          int i = 0;
          //Get user input
          input = JOptionPane.showInputDialog(
"Enter Morse Code to be Decoded to Plain Text:");
          int length = input.length()- 1;
          while((i != -1) && (i < length))
               i = input.indexOf(" ", s);
                    if(i != -1)
                              String s1 = "";
                              s1 = input.substring(s, i);
                              for( int n = 0; n < cipherKey.length; i++ )
                                   if(s1.equals(cipherKey[n]))
                                        output += langKey[n].toString();
                                        break;
                    if(input.substring(i + 1, i + 2) == " ")
                         output += " ";
                         i++;
                    System.out.println(output);
          System.exit( 0 );
     }//EOMain
}//EOF
Please advise. Thanks again.

Answer 1

Got bored:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class ArrayTest extends Object
  public static void main(String args[])
    HashMap mapMorseToAlpha = new HashMap();
    mapMorseToAlpha.put( ".-", "A" );
    mapMorseToAlpha.put( "-...", "B" );
    mapMorseToAlpha.put( "-.-.", "C" );
    mapMorseToAlpha.put( "-..", "D" );
    mapMorseToAlpha.put( ".", "E" );
    mapMorseToAlpha.put( "..-.", "F" );
    mapMorseToAlpha.put( "--.", "G" );
    mapMorseToAlpha.put( "....", "H" );
    mapMorseToAlpha.put( "..", "I" );
    mapMorseToAlpha.put( ".---", "J" );
    mapMorseToAlpha.put( "-.-", "K" );
    mapMorseToAlpha.put( ".-..", "L" );
    mapMorseToAlpha.put( "--", "M" );
    mapMorseToAlpha.put( "-.", "N" );
    mapMorseToAlpha.put( "---", "O" );
    mapMorseToAlpha.put( ".--.", "P" );
    mapMorseToAlpha.put( "--.-", "Q" );
    mapMorseToAlpha.put( ".-.", "R" );
    mapMorseToAlpha.put( "...", "S" );
    mapMorseToAlpha.put( "-", "T" );
    mapMorseToAlpha.put( "..-", "U" );
    mapMorseToAlpha.put( "...-", "V" );
    mapMorseToAlpha.put( ".--", "W" );
    mapMorseToAlpha.put( "-..-", "X" );
    mapMorseToAlpha.put( "-.--", "Y" );
    mapMorseToAlpha.put( "--..", "Z" );
    mapMorseToAlpha.put( "-----", "0" );
    mapMorseToAlpha.put( ".----", "1" );
    mapMorseToAlpha.put( "..---", "2" );
    mapMorseToAlpha.put( "...--", "3" );
    mapMorseToAlpha.put( "....-", "4" );
    mapMorseToAlpha.put( ".....", "5" );
    mapMorseToAlpha.put( "-....", "6" );
    mapMorseToAlpha.put( "--...", "7" );
    mapMorseToAlpha.put( "---..", "8" );
    mapMorseToAlpha.put( "----.", "9" );
    String strInput = JOptionPane.showInputDialog(" Enter Morse Code to be Decoded to Plain Text:" );
    StringBuffer strbOutput = new StringBuffer();
    if( strInput != null )
      for( StringTokenizer st = new StringTokenizer( strInput ); st.hasMoreTokens(); )
        String strMorseKey = st.nextToken();
        String strAlpha = (String)mapMorseToAlpha.get( strMorseKey );
        if( strAlpha != null )
          strbOutput.append( strAlpha != null ? strAlpha : "#" );
      JOptionPane.showMessageDialog( null, strbOutput.toString() );     
    System.exit( 0 );
}