AboutAndroid - Application to Retrieve System Information

Android Tutorials - Herong's Tutorial Examples

∟AboutAndroid - Application to Retrieve System Information

∟java.lang.System Class - Accessing System Information

This section describes the java.lang.System class on access system-related information and resources including standard input and output.

When writing applications for a new system, I usually want to find out information about that system first. This can be done easily by using the java.lang.System class, which provides access to system-related information and resources including standard input and output.

The java.lang.System class offers the following static methods:

static Console console() - Returns the Console associated with this VM, or null.
static long currentTimeMillis() - Returns the current system time in milliseconds since January 1, 1970 00:00:00 UTC.
static Properties getProperties() - Returns the system properties.
static Map<String, String> getenv() - Returns an unmodifiable map of all available environment variables.
static void load(String pathName) - Loads and links the dynamic library that is identified through the specified path.

The java.lang.System class offers the following static fields:

public static final PrintStream err - Default error output stream.
public static final InputStream in - Default input stream.
public static final PrintStream out - Default output stream.

See next tutorials on how to use java.lang.System class to find out Android system information.

Last update: 2015.

Table of Contents

About This Book

Installing JDK 1.8 on Windows System

Installation of Android SDK R24 and Emulator

Installing Apache Ant 1.9 on Windows System

Developing First Android Application - HelloAndroid

Android Application Package (APK) Files

Android Debug Bridge (adb) Tool

Android File Systems

Android 4.0.3 File Systems

►AboutAndroid - Application to Retrieve System Information

►java.lang.System Class - Accessing System Information

Creating Android Project for Simple Application

Build, Install and Run Android Application

System.getProperties() - Retrieving System Properties

android.widget.ScrollView Class - Scrolling Text View

System.getenv() Method - System Environment Variables

android.os.Environment Class - Environment Folders

android.content.Context - Application Context Information

android.app.Activity Class and Activity Lifecycle

View Objects and Layout Resource Files

Using "adb logcat" Command for Debugging

Build Process and Package File Content

Building Your Own Web Browser

Android Command Line Shell

Samsung Galaxy Tab 3 Mini Tablet

USB Debugging Applications on Samsung Tablet

Android Tablet - LG-V905R

USB Debugging Applications on LG-V905R Tablet

Android Phone - LG-P925g

USB Debugging Applications on LG-P925g Phone

Outdated Tutorials

PDF Printing Version