How to split out a set of data????

Question

package mitsim_converter;
import java.io.*;                            // For input & output classes
import java.util.*;                          // For the Date class
public class testgod {
public static void ReadCoFile(String Co_inputFile, String Co_dirName, String Co_outputName)
    throws IOException {
    File aFile = new File(Co_dirName, Co_outputName); // Output Directory location and name
     aFile.createNewFile();         // Now create a new file if necessary
     if(!aFile.isFile())             // Verify we have a file
       System.out.println("Creating " + aFile.getPath() + " failed.");
       return;
BufferedReader in = new BufferedReader(new FileReader(Co_inputFile));
BufferedWriter out = new BufferedWriter(new FileWriter(aFile.getPath(), true));
//Variable declarations
     int a = 0;
     int b = 0;
     int c = 0;
     String text;
   while ((text = in.readLine()) != null)  //multiple line reading
      for(int i = 0; i < text.length(); i++)
          char word = text.charAt(i);
              if ( word == '{')     //search for the ' { ' charecter
                  a++;              //counting ' { '  unit
      for(int i = 0; i < text.length(); i++)
          char word = text.charAt(i);
              if ( word == '}')     //search for the ' } ' charecter  
                  b++;              //counting ' } '  unit
      if(a == 1)      //print out the 1st line of a set of data
          String[] sentance = text.split(" ");
          System.out.println(sentance[1]+sentance[3]); 
  if(a == b)        // 1 set of data is counted
      a = 0;        //count the next set of data
      b = 0;
      out.write(System.getProperty("line.separator")); //separate a new set of data
    public testgod() {
    public static void main(String[] args)
  throws IOException
// Coordinate Table     
       String tra_inputFile = "C:/Documents and Settings/seng/Desktop/testfile/trajectory.txt";     
       String tra_dirName = "C:/Documents and Settings/seng/Desktop/testfile";
       String tra_outputName = "trajectory_output.txt";
       ReadCoFile(tra_inputFile, tra_dirName, tra_outputName);
} currently i have a set of data as below:
1 {
6 0 2 1037.9 24.4187 -5.4961e-05 1
2 {
1 0 2 1013.5 24.4187 4.99431e-05 1
4 0 1 1057.5 24.4187 -2.63508e-05 0
3 130 264 115.7 14.2425 1.48289e-05 0
2 136 276 464.7 11.6186 -3.46263e-06 1
3 {
1 0 2 989.1 24.4187 -5.4961e-05 1
4 0 1 1033.1 24.4187 2.13329e-05 0
5 126 256 1241.4 22.7881 0 0
3 130 264 101.5 14.2426 5.23758e-07 0
2 136 276 453.1 11.6186 -3.46263e-06 1
}i wish to split them and take out the 1st column and 3rd column data, but the my coding fail to do it. may i know how do i can solve for this problem?
PS: the expected output
6 2
1 2
4 1
3 264
2 276
1 2
4 1
5 256
3 264
2 276

Answer 1

import java.util.regex.*;
public class TestParse {
  public static void main(String[] argv) {
    String testInput = "1 {\n" +
      " 6 0 2 1037.9 24.4187 -5.4961e-05 1\n" +
      "}\n" +
      "2 {\n" +
      " 1 0 2 1013.5 24.4187 4.99431e-05 1\n" +
      " 4 0 1 1057.5 24.4187 -2.63508e-05 0\n" +
      " 3 130 264 115.7 14.2425 1.48289e-05 0\n" +
      " 2 136 276 464.7 11.6186 -3.46263e-06 1\n" +
      "}\n" +
      "3 {\n" +
      " 1 0 2 989.1 24.4187 -5.4961e-05 1\n" +
      " 4 0 1 1033.1 24.4187 2.13329e-05 0\n" +
      " 5 126 256 1241.4 22.7881 0 0\n" +
      " 3 130 264 101.5 14.2426 5.23758e-07 0\n" +
      " 2 136 276 453.1 11.6186 -3.46263e-06 1\n" +
      "}\n";
    Pattern outer =
      Pattern.compile("\\s*(\\d+)\\s*\\{([\\s\\d\\.\\-\\+e]+)\\}");
    Pattern inner = Pattern.compile("LEFT AS EXERCISE");
    Matcher m = outer.matcher(testInput);
    while(m.find()) {
      if (m.groupCount() != 2) {
        System.err.println("Error: found wrong number of groups: " + m.groupCount());
      } else {
        System.out.print("Time: " + m.group(1) + " " + m.group(2));
        Matcher m2 = inner.matcher(m.group(2));
        while(m2.find()) {
          if (m2.groupCount() != 7) {
            System.err.println("Error: found wrong number of groups: " + m2.groupCount());
          } else {
            int i = 0;
            String iDString = m2.group(++i);
            String segmentString = m2.group(++i);
            String laneString = m2.group(++i);
            String positionString = m2.group(++i);
            String speedString = m2.group(++i);
            String accelerationString = m2.group(++i);
            String vehicleTypeString = m2.group(++i);
            System.out.println(
              "ID: " + iDString + "\n" +
              "Segment: " + segmentString + "\n" +
              "Lane: " + laneString + "\n" +
              "Position: " + positionString + "\n" +
              "Speed: " + speedString + "\n" +
              "Acceleration: " + accelerationString + "\n" +
              "VehicleType: " + vehicleTypeString);
}