Convert Hex To Dec in java with HashMap and put in .txt file

I'm making a compiler for assembler in JAVA. My program after several processes leaves a text file as follows. 02TLIGHT2.ASM file with this:

CLO Start: MOV AL,0 OUT 01 MOV AL,FC OUT 01 JMP Start END

Im trying by means of my hashmap convert the commands to his assigned hexadecimal value and put it in a text file?

The output of my actual program in a 02TLIGHTHexa.ASM file is: 

FE

D0 00 00 F1 null D0 00 null F1 null C0 F6

The problem is that when the program does not find something in the hashmap it puts it as null, what I need is that if it does not find it write the same and not null. Also ... the program validates if there is a start or end, if it finds them deletes but leaves a space. Is it possible to remove that space?

_{Example: If the program reads FC and is not in the hashmap, write FC. As in the example below}

Sample program output i need in 02TLIGHTHexa.ASM file

FE D0 00 00 F1 01 D0 00 FC F1 01 C0 F6

++++++++++++++++++++++++++++CODE++++++++++++++++++++++++++++++++++++++++++++++++++

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package hexap;

import java.io.*; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.regex.*; import static jdk.nashorn.internal.objects.NativeArray.map; //import static softwaresistemas.CambiaReg.CambiaReg; //import static softwaresistemas.eliminaContenido.eliminaContenido;

/** * * @author Naf_Ross */ public class HexaP {

/** * @param args the command line arguments */ public static void main(String[] args) throws FileNotFoundException, IOException { String linea; HashMap map=new HashMap(); map.put("MOV","D0"); map.put("ADD","A0"); map.put("SUB", "A1"); map.put("MUL", "A2"); map.put("DIV","A3" ); map.put("INC", "A4"); map.put("DEC", "A5"); map.put("AND","AA"); map.put("OR","AB"); map.put("XOR","AC"); map.put("NOT","AD" ); map.put("ROL","9A" ); map.put("ROR", "9B"); map.put("SHL", "9C"); map.put("SHR", "9D"); map.put("CMP","DA" ); map.put("JMP","C0" ); map.put("JZ", "C1"); map.put("JNZ","C2" ); map.put("JS","C3" ); map.put("JNS", "C4"); map.put("JO","C5" ); map.put("JNO", "C6"); map.put("CALL","CA" ); map.put("RET", "CB"); map.put("INT","CC" ); map.put("IRET","CD" ); map.put("POP","E1" ); map.put("PUSH","E0" ); map.put("PUSHF","EA" ); map.put("POPF","EB" ); map.put("IN","F0" ); map.put("OUT","F1" ); map.put("CLO","FE" ); map.put("HALT","00" ); map.put("NOP", "FF"); map.put("STI", "FC"); map.put("CLI", "FD"); map.put("ORG", ""); map.put("DB","" ); map.put("AL","00" ); map.put("BL","01" ); map.put("CL","02" ); map.put("DL","03" );

map.put("Start","F6" ); //map.put("FC","FC" ); File archivoFuente = new File ("C:/Program Files/Ensamblador/02TLIGHT2.ASM"); FileReader fr = new FileReader (archivoFuente); BufferedReader br = new BufferedReader(fr); FileWriter archivoMaquina = new FileWriter("C:/Program Files/Ensamblador/02TLIGHT2Hexa.ASM"); PrintWriter pw = new PrintWriter(archivoMaquina);

while ((linea=br.readLine())!=null) { linea = linea.trim(); String[] lineaToPrint = linea.split(",|\\s"); String[] counterToPrint = linea.split(",|\\s"); int i; for(i=0; i if(lineaToPrint[i].equals("START:") || lineaToPrint[i].equals("END") || lineaToPrint[i].equals("Start:")){ continue; }else{ if(lineaToPrint[i].equals("0") || lineaToPrint[i].equals("1")){ counterToPrint[i] = "0"+ lineaToPrint[i]; } else{ counterToPrint[i] = (String)map.get(lineaToPrint[i]); } pw.print(counterToPrint[i] + " "); System.out.print(counterToPrint[i] + " "); } } System.out.println(); pw.println(); } fr.close(); archivoMaquina.close();

} }