Fs.java

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package basic;
 
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
 
/**
 *
 * @author cteam043
 */
public class Fs {
 
    static final double EPS = 1E-7;
    StringTokenizer st = new StringTokenizer("");
    BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
 
    public Fs() {
 
        encodingSToM = new HashMap<String, String>();
        // first to check
        encodingSToM.put("A", ".-");
        encodingSToM.put("B", "-...");
        encodingSToM.put("C", "-.-.");
        encodingSToM.put("D", "-..");
        encodingSToM.put("E", ".");
        encodingSToM.put("F", "..-.");
        encodingSToM.put("G", "--.");
        encodingSToM.put("H", "....");
        encodingSToM.put("I", "..");
        encodingSToM.put("J", ".---");
        encodingSToM.put("K", "-.-");
        encodingSToM.put("L", ".-..");
        encodingSToM.put("M", "--");
        encodingSToM.put("N", "-.");
        encodingSToM.put("O", "---");
        encodingSToM.put("P", ".--.");
        encodingSToM.put("Q", "--.-");
        encodingSToM.put("R", ".-.");
        encodingSToM.put("S", "...");
        encodingSToM.put("T", "-");
        encodingSToM.put("U", "..-");
        encodingSToM.put("V", "...-");
        encodingSToM.put("W", ".--");
        encodingSToM.put("X", "-..-");
        encodingSToM.put("Y", "-.--");
        encodingSToM.put("Z", "--..");
        encodingSToM.put("_", "..--");
        encodingSToM.put(",", ".-.-");
        encodingSToM.put(".", "---.");
        encodingSToM.put("?", "----");
 
        encodingMToS = invertMap(encodingSToM);
        inputText = "";
        morseText = "";
        morseNumbers = "";
        outputText = "";
        outputNumbers = "";
 
 
    }
 
    private HashMap<String, String> invertMap(Map<String, String> input) {
        HashMap<String, String> output = new HashMap<String, String>();
        for (Entry<String, String> entry : input.entrySet()) {
            String outputV = entry.getKey();
            String outputK = entry.getValue();
            output.put(outputK, outputV);
        }
        return output;
    }
 
    String nextToken() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(input.readLine());
        }
        return st.nextToken();
    }
 
    int nextInt() throws Exception {
        return Integer.parseInt(nextToken());
    }
    HashMap<String, String> encodingSToM;
    HashMap<String, String> encodingMToS;
    String inputText;
    String morseText;
    String morseNumbers;
    String outputText;
    String outputNumbers;
    boolean testOutput;
 
    private void createMorse() {
        String aChar;
        String charsMorse;
 
        for (int i = 0; i < inputText.length(); i++) {
            // CHECK
            aChar = Character.toString(inputText.charAt(i));
            if (testOutput) {
                System.out.println("Char is " + aChar);
            }
            charsMorse = encodingSToM.get(aChar);
            if (testOutput) {
                System.out.println("charsMorse is " + charsMorse);
            }
            if (testOutput) {
                System.out.println("charsMorse.length is " + charsMorse.length());
            }
            morseNumbers = morseNumbers.concat(String.valueOf(charsMorse.length()));
            morseText = morseText.concat(charsMorse);
        }
 
    }
 
    private void createPlainText() {
        String charsMorse;
        String plainChar;
        int morsePos = 0;
        int morseCharLen = 0;
 
        for (int i = 0; i < inputText.length(); i++) {
 
            // CHECK = Character.toString(inputText.charAt(i));
            morseCharLen = Integer.parseInt(Character.toString(outputNumbers.charAt(i)));
            if (testOutput) {
                System.out.println("morseCharLen is " + morseCharLen);
            }
            if (testOutput) {
                System.out.println("morsePos is " + morsePos);
            }
 
            charsMorse = morseText.substring(morsePos, morsePos + morseCharLen);
            if (testOutput) {
                System.out.println("charsMorse is " + charsMorse);
            }
            plainChar = encodingMToS.get(charsMorse);
            if (testOutput) {
                System.out.println("plainChar is " + plainChar);
            }
            outputText = outputText.concat(plainChar);
            morsePos += morseCharLen;
        }
 
    }
 
    private void reverseNumbers() {
        String aNumber;
        for (int i = 0; i < morseNumbers.length(); i++) {
            // CHECK
            aNumber = Character.toString(morseNumbers.charAt(morseNumbers.length() - i - 1));
            outputNumbers = outputNumbers.concat(aNumber);
        }
 
    }
 
    public void solve() {
        testOutput = false;
        while (1 == 1) {
            try {
 
                inputText = nextToken();
            } catch (Exception ex) {
                return;
            }
            createMorse();
 
            if (testOutput) {
                System.out.println("Code:\n" + morseText);
                System.out.println("Numbers:\n" + morseNumbers);
            }
 
            reverseNumbers();
            createPlainText();
 
            if (testOutput) {
                System.out.println("Plaintext:\n" + outputText);
            }
 
            System.out.println(outputText);
 
        }
    }
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {
        Fs instance = new Fs();
        instance.solve();
    }
}