Finding an arbitrary user's home directory in Linux/UNIX

find-user-home.txt

Usage:
  javac TextExec.java
  java TestExec

Output:
  /home/username

TestExec.java

import java.io.*;
 
public class TestExec {
    public static void main(String[] args) {
        try {
            
            // Replace 'username' with the actual username
            String[] cmd = {"/bin/sh", "-c", "echo ~username"};
            
            Process p = Runtime.getRuntime().exec(cmd);
            BufferedReader in = new BufferedReader(
                                new InputStreamReader(p.getInputStream()));
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}