Installing Java for Windows OS

Java installation on Windows is pretty straightforward. As mentioned in the previous section, installing JDK provides JRE as well.

Download the jdk-7u79-windows-x64.exe file and run it to start the installation.

Install Java

Start the Java installation by clicking the jdk-7u79-windows-x64.exe file after downloading it; you will see the dialog box shown in Figure 1.2.

1. Click the Next button to continue.
2. In the window that opens, all items are selected by default to be installed on your local hard drive. You can change the installation path and which installation modules to install. For Android application development, the Public JRE and Development Tools options must be selected if they are not already installed on your machine. (If they are already installed, they will not be listed inside the window.) You may deselect Source Code, which is used to install public Java API classes. It is not mandatory to install the source code. Make your selections in the dialog shown in Figure 1.3.
3. We suggest that you continue with the default selections and use the default installation path, then click Next to finish the installation.

Setting Paths for Java on Windows 10

After the installation finishes, you need to set the Windows 10 environment paths for Java to configure the system environment. You need to set a path for the JAVA_HOME system variable.

1. Right-click the Start menu icon and click File Explorer. In the window that opens, right-click This PC and select Properties to open the System window.
2. From the options at the left of the System window, select Advanced system settings. This will open the dialog box shown in Figure 1.4 with the Advanced tab enabled.
3. Click the Environment Variables… button shown in Figure 1.4.
4. From the Environment Variables window that opens, click the New button and set the Java path with your installation directory. As shown in Figure 1.5, the path is C:Program FilesJavajdk1.7.0_79 for our 64 bit installation. If you installed the x86 version, your path would be different, such as C:Program Files (x86)Javajdk1.7.0_79.

Installing Java for MacOS X

Java used to be a part of Mac OS X and was shipped by Apple. This changed several years ago. Apple also decided to remove Java from Mac OS so JDK, which is provided by Oracle, needs to be installed separately.

1. Start by downloading the jdk-7u79-macosx-x64.dmg file from the page shown in Figure 1.1.
2. Launch the dmg file to display the window shown in Figure 1.6.
3. Double click the JDK 7 Update 79.pkg file link to start the installation.
4. Select the installation directory you want and complete the installation in the window shown in Figure 1.7.

Now JDK is ready to use on Mac OS X. You can check the installed JDK version from System Preferences of Mac OS X or type 'java –version' in the terminal window to see whether Java installed properly.

Installing Java for Linux

Two types of installation packages are available for Linux. If you use a distribution with an rpm package manager like Fedora, you can download the rpm package and install Java via rpm. In this section you install JDK with the tar.gz package on Ubuntu 14.04.

1. Download jdk-7u79-x64.tar.gz from the download page shown in Figure 1.1 and extract it to the directory where you downloaded the tar.gz file using the following command:

   user@ubuntu$ tar xzvf jdk-7uXX-x64.tar.gz

   That command will extract JDK into the jdk1.7.0_79 folder where you ran the command.

2. Move that folder to /usr/local/java with the following command:

   user@ubuntu$ mv jdk1.7.0_79 /usr/local/java

3. Edit the /etc/profile file to set Java paths for your session. You can copy and paste the following lines to the end of the /etc/profile file.

   ##Java Path
   JAVA_HOME=/usr/local/java/jdk1.7.0_79
   JRE_HOME=$JAVA_HOME/jre
   PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
   export JAVA_HOME
   export JRE_HOME
   export PATH

4. Install Java binaries for system-wide use with the following commands:
   • Install the Java binary:

     user@ubuntu$ sudo update-alternatives --install "/usr/bin/java" "java"
     "/usr/local/java/jdk1.7.0_79/bin/java" 1

   • Install the Java Compiler binary javac:

     user@ubuntu$ sudo update-alternatives --install "/usr/bin/javac" "javac"
     "/usr/local/java/jdk1.7.0_79/bin/javac" 1

   • Install the Java Web Start binary javaws:

     user@ubuntu$ sudo update-alternatives --install "/usr/bin/javaws" "javaws"
     "/usr/local/java/jdk1.7.0_79/bin/javaws" 1

5. Set Oracle Java as the default Java for your system with the following commands:

   user@ubuntu$ sudo update-alternatives --set java
   /usr/local/java/jdk1.7.0_79/bin/java
   user@ubuntu$ sudo update-alternatives --set javac
   /usr/local/java/jdk1.7.0_79/bin/javac
   user@ubuntu$ sudo update-alternatives --set javaws
   /usr/local/java/jdk1.7.0_79/bin/javaws

When you are done with the previous instructions, JDK and JRE will be ready to use when you restart Ubuntu. You can test whether Java installed correctly with version control. The command and output for that will look like this:

user@ubuntu~$ java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

Installing Android Studio for Microsoft Windows 10

This section covers the installation instructions for Android Studio on Microsoft Windows 10.

1. Click the Download Android Studio for Windows link to download the latest Android Studio installer exe file.
2. Run the exe file after the download completes. You will see the window shown in Figure 1.9.
3. Click the Next button to select installation components. The Android Studio option can't be changed, but you can deselect the Android SDK, Emulator, and Intel HAXM installations, as shown in Figure 1.10.
4. The next window prompts you for installation paths for Android Studio and Android SDK separately.
5. As shown in Figure 1.11, the installation asks about Intel HAXM memory configuration, and lets you choose a custom memory configuration.

You are now ready to launch Android Studio on Windows. The first time you launch Android Studio, it asks you to select the theme for the IDE, as shown in Figure 1.12.

Finally, the installation completes and Android Studio is ready to work on Android application projects.

Installing Android Studio for Mac OS X

This section covers the basic steps to install Android Studio on Mac OS X.

1. From the page shown in Figure 1.8, click the Download Android Studio for MAC link.

   Download the android-studio-ide-141.2178183-mac.dmg file, which includes the Android Studio IDE installer for Mac OS.

2. Launch the file you just downloaded.
3. Drag and drop the Android Studio.app icon into Applications folder, as shown in Figure 1.13.

After copying Android Studio to the Applications folder, Android Studio is ready to launch. You can then remove the .dmg file from your system.

When you first launch Android Studio, it asks if you want to install Android SDK, the Android emulator, and Intel HAXM. It will also ask for the setup path for them, as shown in Figure 1.14.

If you selected Intel HAXM installation, you are asked for the amount of RAM memory you want to make available for the virtual devices, as shown in Figure 1.15.

After you click Finish from the Emulator Settings dialog box, a window with an installation summary will display as shown in Figure 1.16.

Installing Android Studio for Linux

Navigate to the download page shown in Figure 1.9 to download Android Studio for Linux (android-studio-ide-141.2178183-linux.zip). After you've downloaded the file, follow these steps:

1. Enter the following command to extract the setup file to the android-studio folder where you executed the command:

   user@ubuntu$ unzip android-studio-ide-141.2178183-linux.zip

   In this example you move the android-studio folder to the /opt directory. You can select your own home directory as well, to make it available only to you.

   user@ubuntu$ sudo mv android-studio /opt

2. Start Android Studio with the ./opt/android-studio/bin/studio.sh command.

   When you first launch Android Studio on Linux, it will display the screen shown in Figure 1.17.

   Then the setup wizard will ask for Standard or Custom installation.

3. Select Custom installation to see the installation packages.

   The wizard moves to the window shown in Figure 1.18 where you can select an Android Studio UI theme.

   Figure 1.18 shows that the IntelliJ theme has been selected for this installation.

4. Select the Android Studio, Android SDK, and Emulator as shown in Figure 1.19.
5. Indicate the installation path for Android SDK in the Android SDK Location field at the bottom of the dialog box, as shown in Figure 1.19. Click Finish to complete the Android SDK installation.

Welcome to Android Studio

Welcome to the world of Android development! When you finish installing Android Studio, you will finally reach the screen shown in Figure 1.21. Android Studio is ready to work with Android projects.