Before you can create programs written in Java, you need some Java development software. There are several products to choose from. In fact, you may already have one of these products on your own computer. If you don't, you can download the basic software by visiting this official Oracle website.
System Requirements
See Oracle JRE 7 and JDK 7 Certified System Configurations for information about supported platforms, operating systems and browsers.
For 32-bit Platforms:
Both the Java SE Development Kit (JDK) and Java SE Runtime Environment (JRE) require at minimum a Pentium 2 266 MHz proccessor.
Disk Space Requirements
Disk Space Requirements
| JRE | Installed Image |
| Java Runtime Environment, including JavaFX Runtime | 124 MB |
| Java Update | 2 MB |
| JDK | Installed Image |
| Development Tools, including JavaFX SDK | 245 MB |
| Source Code | 27 MB |
| Public Java Runtime Environment | See the table, "Disk Space Requirements for JRE" |
Memory Requirements
| Version | Memory |
|---|---|
| Windows 8 | 128 MB |
| Windows 7 | 128 MB |
| Windows Vista | 128 MB |
| Windows Server 2008 | 128 MB |
For 64-bit Platforms:
Disk Space Requirements
- The JDK features available for 64-bit platforms are the same as those for Windows 32-bit operating systems.
- The disk requirement for development tools for 64-bit platforms is 181 MB. The disk space requirements for source code and the public JRE are the same as those for Windows 32-bit operating systems, except for the JavaFX SDK (68 MB) and the JavaFX runtime (32 MB).
Memory Requirements
The following tables list the minimum memory requirements for Windows 64-bit operating systems:
Note: The minimum physical RAM is required to run graphically based applications. More RAM is recommended for applets running within a browser using the Java Plug-in. Running with less memory may cause disk swapping, which has a severe effect on performance. Very large programs may require more RAM for adequate performance.
| Version | Memory |
|---|---|
| Windows 8 | 128 MB |
| Windows 7 | 128 MB |
| Windows Server 2008 | 128 MB |
| Windows Vista | 128 MB |
| Version | Memory |
|---|---|
| Windows 8 | 128 MB |
| Windows 7 | 128 MB |
| Windows Server 2008 | 128 MB |
| Windows Server 2008 R2 | 128 MB |
| Windows Vista | 128 MB |
Downloading Java and Setting up the 'Path'
Java SE is freely available from the link Download Java. So you download a version based on your operating system.
Follow the instructions to download java and run the .exe to install Java on your machine. Once you installed Java on your machine, you would need to set environment variables to point to correct installation directories:
Assuming you have installed Java in c:\Program Files\java\jdk directory:
- Right-click on 'My Computer' and select 'Properties'.
- Click on the 'Environment variables' button under the 'Advanced' tab.
- Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.
And that's all there is to it! You are now ready for the most exciting part. Writing your own program.
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