Question

I wrote a simple java application, I have a problem please help me;

I have a file (JUST EXAMPLE):

1.TXT
-------
SET MRED:NAME=MRED:0,MREDID=60;
SET BCT:NAME=BCT:0,NEPE=DCS,T2=5,DK0=KOR;
CREATE LCD:NAME=LCD:0;
-------

and this is my source code

import java.io.IOException;
import java.io.*;
import java.util.StringTokenizer;

class test1 {

    private final int FLUSH_LIMIT = 1024 * 1024;
    private StringBuilder outputBuffer = new StringBuilder(
            FLUSH_LIMIT + 1024);
    public static void main(String[] args) throws IOException {
        test1 p=new test1();
        String fileName = "i:\\1\\1.txt";
        File file = new File(fileName);
        BufferedReader br = new BufferedReader(new FileReader(file));
        String line;
        while ((line = br.readLine()) != null) {
            StringTokenizer st = new StringTokenizer(line, ";|,");
            while (st.hasMoreTokens()) {
                String token = st.nextToken();
                p.processToken(token);

            }
        }
        p.flushOutputBuffer();
    }

    private void processToken(String token) {
        if (token.startsWith("MREDID=")) {
            String value = getTokenValue(token,"=");
            outputBuffer.append("MREDID:").append(value).append("\n");
        } else if (token.startsWith("DK0=")) {
            String value = getTokenValue(token,"=");
            outputBuffer.append("DK0=:").append(value).append("\n");
        } else if (token.startsWith("NEPE=")) {
            String value = getTokenValue(token,"=");
            outputBuffer.append("NEPE:").append(value).append("\n");
        }
        if (outputBuffer.length() > FLUSH_LIMIT) {
            flushOutputBuffer();
        }
    }

    private String getTokenValue(String token,String find) {
        int start = token.indexOf(find) + 1;
        int end = token.length();
        String value = token.substring(start, end);
        return value;
    }

    private void flushOutputBuffer() {
        System.out.print(outputBuffer);
        outputBuffer = new StringBuilder(FLUSH_LIMIT + 1024);
    }

}

I want this output :

MREDID:60
DK0=:KOR
NEPE:DCS

But this application show me this :

MREDID:60
NEPE:DCS
DK0=:KOR

please tell me how can i handle this , because of that DK0 must be at first and this is just a sample ; my real application has 14000 lines

Thanks …

Answer 1

Instead of outputting the value when you read it, put it in a hashmap. Once you’ve read your entire file, output in the order you want by getting the values from the hashmap.