[SOLVED] getting values from a text file

[dav9999]

I have a great big text file that looks like this:

jackson=4000000
monroe=70000000
lincoln=4777749
etc....

i'm trying to get java to return the value after the = sign.

So if my program asks "Which street value are you interested in?" and let's say they type in jackson, it will return the value 4000000.


I've tried a bunch of different methods but I can't seem to get it to work.

[DonCash]

Hello Dav9999 and welcome to the Java Forums.

I suggest using the Java Split function and storing each value into an Array so they can be called later.

Do you understand or do you need help further?

[dav9999]

it has about 3000 lines of name=value in it. can i still do that?

[hardwired]

Code:

import java.io.*;

public class SplittingText {
    public static void main(String[] args) {
        String target = "lincoln";
        String path = "splittingText.txt";
        try {
            File file = new File(path);
            BufferedReader br = new BufferedReader(
                                new InputStreamReader(
                                new FileInputStream(file)));
            String line;
            while((line = br.readLine()) != null) {
                if(line.indexOf(target) != -1)
                    break;
            }
            String[] s = line.split("\\=");
            System.out.println("value for " + target +
                               " is: " + s[1]);
            br.close();
        } catch(IOException e) {
            System.out.println("read error: " + e.getMessage());
        }
    }
}

splittingText.txt

Code:

jackson=4000000
monroe=70000000
lincoln=4777749

[DonCash]

Yeah Java can handle that no problem.

Ah HardWired you love it!!

[dav9999]

hardwired, thanks I see how that works now, but can the String target be taken from user input?

[DonCash]

Yeah Dav it can...

Code:

System.out.println("Which Street?:");
	      
// Opens up standard input
BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 
String target = null; 
	      
// Read the Street name from the command-line
try { 
target = br.readLine(); 
} catch (IOException ioe) { 
System.out.println("IO error reading command line input");
System.exit(1); 
}

[dav9999]

how would I include this code in the above?? I tried it like this, but it didn't work

import java.io.*;

public class SplittingText {
public static void main(String[] args) {
System.out.println("Which Street?:");

// Opens up standard input
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String target = null;
String path = "splittingText.txt";
try {
target = br.readLine();
} catch (IOException ioe) {
System.out.println("IO error reading command line input");
System.exit(1);
}
String[] s = line.split("\\=");
System.out.println("value for " + target +
" is: " + s[1]);
br.close();
} catch(IOException e) {
System.out.println("read error: " + e.getMessage());
}
}

[Bluefox815]

this is how.

Code:

import java.io.*;

public class SplittingText {
    public static void main(String[] args) {
        // initialization
        BufferedReader bi = new BufferedReader(new InputStreamReader(System.in)); 
        String target = null;
        String path = "splittingText.txt";
        try {
            File file = new File(path);
            BufferedReader br = new BufferedReader(
                                new InputStreamReader(
                                new FileInputStream(file)));
            // get user input
            System.out.println("Which street?:");
            try { 
                target = bi.readLine(); 
            } catch (IOException ioe) { 
                System.out.println("IO error reading command line input");
                System.exit(1); 
            }
            String line;
            while((line = br.readLine()) != null) {
                if(line.indexOf(target) != -1)
                    break;
            }
            String[] s = line.split("\\=");
            System.out.println("value for " + target +
                               " is: " + s[1]);
            br.close();
        } catch(IOException e) {
            System.out.println("read error: " + e.getMessage());
        }
    }
}

Also, since you're new, if you were wondering how to get the above box use [/code] and [code] only reversed the other way (Mine are backwards so there isn't a box)