Difficulty defining the path where a particular txt will be created

Question

The method below generates a txt containing certain information:

public static void gravarIp(String ip)
{   
    try {
        File arquivo = new File("ip.txt");  
        FileOutputStream fos = new FileOutputStream(arquivo);  
        String texto = ip;  
        fos.write(texto.getBytes());  
        fos.close();
        atualizarPortal(ip);
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
}

However, this txt is being generated at the place where the instruction is executed:

c:\>java -cp c:\users\fabio\desktop EnviarIp

That is, if the above statement is executed and I am at the root of c: txt will be generated there. How do I generate txt on the same root as the Send file without specifying the absolute path in the source code?

Answer 1

The most I could was to generate a file in a fixed location like the User folder (it can be a subfolder inside it if you want) or an Absolute Path as C disk:, Program Files folder etc.

Stay like this:

import java.io.*;

public class Teste {
    public static void main(String[] args) {        
        try {       
            File arquivo = new File(System.getProperty("user.home"), "ip.txt");  
            FileOutputStream fos = new FileOutputStream(arquivo);  
            String texto = "192.168.1.1";  
            fos.write(texto.getBytes());  
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Unfortunately I could not generate the file in the same location as the class/jar.

---

Answer found with the help of the question user himself:

import java.io.*;

public class Teste {
    public static void main(String[] args) {        
        try {
            String diretorio = System.getProperty("user.dir");      
            File arquivo = new File(diretorio, "ip.txt");  
            FileOutputStream fos = new FileOutputStream(arquivo);  
            String texto = "192.168.1.1";  
            fos.write(texto.getBytes());  
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

I put in the Github for future reference.

Searching the property System.getProperty("user.dir") is the directory where the class is. Sorry I didn’t find out earlier and I thank you.

Source: System Properties - Java

Answer 2

If you want the current path and not a fixed one:

String path = new File(".").getCanonicalPath();

I put in the Github for future reference.