I am sure there are many tutorials available on ‘How to Install Java on Windows’, and here I have written a step by step tutorial with screenshots to install the Java in your Windows machine.
Java Development Kit (JDK) can be downloaded from ‘Oracle – Java SE Download‘ site freely in order to develop Java Applications and Applets.
What is JDK and JRE?
JDK – Is a ‘Java Development Kit’ which also includes JRE and development tools (like Compiler and Debugger) is required for developing Java Applications and Applets.
JRE – Is a ‘Java Runtime Environment’ is required for running Java Applications and Applets.
So which one to install?
If you are writing Java programs, then you are required to install both the JDK and JRE
Un-Install the older version(s) of Java (JDK/JRE)
You can have multiple versions (old and new) of Java in your machine. But it is always recommended to un-install the older version of Java and install the current version of Java.
This tutorial applicable to Windows XP, Windows 7 (32 bit and 64 Bit), and Windows 8
Step 1: To Download the JDK go to ‘Oracle – Java SE Download‘ site
Step 2: Click on the ‘Download’ button under ‘JDK’ of ‘Java SE 7
Step 3: In the next page ‘Accept License Agreement’ and select your operating system type (32 bit or 64 bit)
32-bit Windows OS – Windows x86
64-bit Windows OS – Windows x64
From the above link I have downloaded ‘Windows x64′ for my Windows7 64 bit for demo purpose.
Step 4: Install JDK and JRE
Run the downloaded installer ‘e.g: jdk-7u9-windows-x64.exe, which installs both the JDK (Java Development Kit) and JRE (Java Runtime Environment).
By default, the JDK will be installed in directory “C:Program FilesJavajdk1.7.0_09″; and JRE in “C:Program FilesJavajre7″.
For now, accept the defaults and click “next” to install JDK in “C:Program FilesJavajdk1.7.0_09” and JRE in “C:Program FilesJavajre7“.
Once the installation completes you would see this screen and click on Close.
Take note of your JDK installed directory - C:Program FilesJavajdk1.7.0_09.
From now on wards refer to the JDK installed directory as <JAVA_HOME> in this article.
Step 5: Verify the JDK Installation on your Windows Machine
Launch the Command (CMD) prompt.
Start ->’Search programs and files’ for CMD
Issue the following commands to verify that JDK is properly installed and display its version:
If you see similar to above screen; then the Java is installed properly on your machine.
You can also check this is in the Installed Programs and Features –> from Control Panel
Step 6: How to Set Java PATH
Windows Operating System searches the current directory and the directories listed in the PATH environment variable for executable programs.
Step A: Go to ‘Control Panel’ (Example: This demo is on ‘Windows 7 64 bit’)
Step B: Click on the ‘System’ Item
Step C: Click on the ‘Advanced system settings’
Step D: Click on the ‘Advanced’ Tab
Step E: Click on the ‘Environment Variables’ Tab
Step F: Under ‘System variables’ -> search for PATH variable ->Click on ‘Edit’ Tab
Here you need to copy the whole path of bin folder:
For Example: C:\Program Files\Java\jdk1.7.0_09\bin
In the ‘Variable Value’ field, insert the path; in-front of all the existing variable path followed by a semi-colon “;” that separates the JDK’s binary directory from the rest of the existing directories path.
Step 7: Verify the Java path set properly
Open the Command Prompt ->Start -> ‘Run’ or ‘Search programs and files’ for “CMD”.
Issue the “path” command to see the content of the PATH environment variable.
Verify the output and make sure that “C:Program FilesJavajdk1.7.0_09bin” is listed in the PATH.
NOTE: Your Java PATH variable needs to set in-front of all the existing variable path followed by a semi-colon “;” , this is because there might be a conflict with your other jre installed versions.
NOTE: Setting Java PATH variable also helps in resolving the ‘AVD Manager Installer’ issue.
AVD Manager Installer complains that Java not installed; if the Java PATH variable is not set
If the Java PATH variable is set ‘AVD Manager Installer’ installation can be continued
Finally, restart your machine.
Let me know If you have any questions.
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How to Install Java on Windows is a post from: TEKDigest
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