FileIO.java

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

public class FileIO {
  public static void main(String[] args) {
    // testing in home directory replace HOME before compiling
    // and create test directory structure resembling what is seen on a Nexus 5X
    // The directory under fusb301 may? vary from device to device
    File file = new File("HOME/power/sys/bus/i2c/drivers/fusb301/");

    // Reading directory contents
    File[] files = file.listFiles();
    File fclientcur = null;
    // find device subdirectory
    for (int i = 0; i < files.length; i++) {
      if(files[i].isDirectory()) {
        fclientcur = new File(files[i], "fclientcur");
        break;
      }
    }

    if (fclientcur != null && fclientcur.exists()) {
      try {
        BufferedReader reader = new BufferedReader(new FileReader(fclientcur));
        String line = null;
        while(true) {
          line = reader.readLine();
          if(line == null)
            break;
          System.out.println(line);
          
        }
      } catch(Exception e) {}
    }
  }
}