import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.app.Activity;
public class main {


public static void main(String[] args) throws Exception {
  print("Battery level: " + androidGetBattery());
}



static int androidGetBattery() {
  Intent batteryIntent = androidContext().registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
  int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
  int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

  // Error checking that probably isn't needed but I added just in case.
  if(level == -1 || scale == -1) {
      return -1;
  }

  return (int) (((float)level / (float)scale) * 100.0f);
}
static volatile StringBuffer local_log = new StringBuffer(); // not redirected
static volatile StringBuffer print_log = local_log; // might be redirected, e.g. to main bot

// in bytes - will cut to half that
static volatile int print_log_max = 1024*1024;
static volatile int local_log_max = 100*1024;

static boolean print_silent; // total mute if set

static void print() {
  print("");
}

// slightly overblown signature to return original object...
static <A> A print(A o) {
  if (print_silent) return o;
  String s = String.valueOf(o) + "\n";
  StringBuffer loc = local_log;
  StringBuffer buf = print_log;
  int loc_max = print_log_max;
  if (buf != loc && buf != null) {
    print_append(buf, s, print_log_max);
    loc_max = local_log_max;
  }
  if (loc != null) 
    print_append(loc, s, loc_max);
  System.out.print(s);
  return o;
}

static void print(long l) {
  print(String.valueOf(l));
}

static void print(char c) {
  print(String.valueOf(c));
}

static void print_append(StringBuffer buf, String s, int max) {
  synchronized(buf) {
    buf.append(s);
    max /= 2;
    if (buf.length() > max) try {
      int newLength = max/2;
      int ofs = buf.length()-newLength;
      String newString = buf.substring(ofs);
      buf.setLength(0);
      buf.append("[...] ").append(newString);
    } catch (Exception e) {
      buf.setLength(0);
    }
  }
}



static Activity androidContext() {
  return getAndroidContext();
}


static Activity androidContext;

static Activity getAndroidContext() {
  return androidContext;
}

}