This section provides a tutorial example on how to download and install JDK (or J2SE) 1.5.0 on a Windows XP system. A simple Java program was entered, compiled, and executed with the new JDK installation.
Downloading and installing JDK (or J2SE) 1.5.0 on a Windows system is easy. Here is what I did
on my Windows XP system in year 2006:
1. Go to java.sun.com/j2se/1.5.0/download.jsp.
2. Click the "Download JDK" hyper link.
3. Follow the instructions on the Web pages to download
jdk-1_5_0-windows-i586.exe to a working directory on your hard disk.
This file is about 45 MB.
4. Double click on the file name: jdk-1_5_0-windows-i586.exe in the
working directory in the File Explorer.
5. Follow the instruction on the installation window to finish the installation.
Remember to specify the target directory to be: \j2sdk1.5.0.
6. Open a command window to try the java command.
If you are getting the following output, your installation was ok:
returns with message:
\j2sdk1.5.0\bin\java -version
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode)
Once JDK is installed, you can try to use it to compile and execute a simple Java program:
1. Use Notepad to enter the following Java program into a file called Hello.java:
class Hello {
public static void main(String[] a) {
System.out.println("Hello world!");
}
}
2. Then compile this program in a command window with the javac command:
\j2sdk1.5.0\bin\javac Hello.java
3. To execute the program, use the java command:
\j2sdk1.5.0\bin\java -cp . Hello
Hello world!
Congratulations, you have successfully entered, compiled and executed your
first Java program with JDK 1.5.0.
