How to open and read a file and write specific content to a new file?

Learning Java. Trying to open a file read it and choose needed contents to write in another file. My file looks like this:

DESCRIPTION:
TITILE:
TYPE: image
SOURCE: UIUC Library
FORMAT: jpeg 
IDENTIFIER: 120034 
LATITUDE: 40.109580 
LONGITUDE: -88.228378 

DESCRIPTION: 
TITLE: GSLIS 
SUBJECT: 
TYPE: image 
SOURCE: UIUC Library 
FORMAT: jpeg 
IDENTIFIER: 120155 
LATITUDE: 40.107779 
LONGITUDE:-88.231621

I just wrote two pieces of code, one for open and read, one for match the patterns:

package Functions;

import java.io.IOException;
import java.io.FileReader;
import java.io.BufferedReader;

public class readFileLocal {
    private String path;

    public readFileLocal(String file_path){
        path = file_path;
    }

    public String[] openFile() throws IOException{  
        FileReader freader = new FileReader (path); 
        BufferedReader textReader = new BufferedReader (freader); 

        int numberOfLines = readLines();   
        String[] textData = new String[numberOfLines]; 

        int i;  
        for (i=0; i<numberOfLines; i++){
            textData[i] = textReader.readLine(); 
    }

    textReader.close();
    return textData;
    }

        int readLines() throws IOException{
            FileReader file_to_read = new FileReader(path);
            BufferedReader lines = new BufferedReader (file_to_read);

            String aLine=lines.readLine();
            int numberOfLines = 0;
            while(aLine != null) { 
                numberOfLines ++; 
            }  

            lines.close();
            return numberOfLines;
        }   
}

I also figured how to search a string in the way I wanted with people's help, as shown below:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ReadLatLong
{

    public ReadLatLong(){

       String line = "IDENTIFIER: 115956 LATITUDE: 40.104730 LONGITUDE: -88.228798 DATE RIGHTS IDENTIFIER: 115956 LATITUDE: 40.104730 LONGITUDE: -88.228798 DATE RIGHTS"; 
        String pattern = "IDENTIFIER:\\s(\\d*)\\sLATITUDE:\\s(\\d*\\.?\\d*)\\sLONGITUDE:\\s(.*?)\\s";

       Pattern r = Pattern.compile(pattern);
       Matcher m = r.matcher(line);

       while (m.find()) {
           System.out.println("Image: " + m.group(1)+"|"+m.group(2)+"|"+m.group(3));
       } 
   }
}

Now I wonder how to search the whole file to grab all identifier, latitude, longitude, and put them all out like this: 120034 | 40.109580 | -88.228378 120155 | 40.107779 | -88.231621 Thanks in advance.