This section provides a tutorial example on how to download and install JDK (or J2SE) 1.4.1 on a Windows 2000 system. A simple Java program was entered, compiled, and executed with the new JDK installation.
Downloading and installing JDK (or J2SE) 1.4.1 on a Windows system is easy. Here is what I did
on my Windows 2000 system in year 2005:
1. Go to http://java.sun.com/j2se/1.4.1/download.html
2. Click the download button in the SDK column and next to
"Windows (all languages, including English)" in the "Download J2SE(TM) v 1.4.1" section.
3. Follow the instructions on the Web pages to download
j2sdk-1_4_1-windows-i586.exe to a working directory on your hard disk.
This file is about 35 MB.
3. Double click on the file name: j2sdk-1_4_1-windows-i586.exe in the
working directory in the File Explorer.
4. Follow the instruction on the installation window to finish the installation.
5. Open a command window to try the java command.
If you are getting the following output, your installation was ok:
returns with message:
\j2sdk1.4.1\bin\java -version
java version "1.4.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-b21)
Java HotSpot(TM) Client VM (build 1.4.1-b21, 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:
\j2sdk1.4.1\bin\javac Hello.java
3. To execute the program, use the java command:
\j2sdk1.4.1\bin\java -cp . Hello
Hello world!
Congratulations, you have successfully entered, compiled and executed your
first Java program with JDK 1.4.1.
When a new release of J2SDK is available, you can always to go back to the
same download Web site, download j2sdk-1_4_1_01-windows-i586.exe, and run it to install.
You may use the "java -version" command to verify the installation:
\j2sdk1.4.1_01\bin\java -version
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)
