How to set JDK environment variable in java
This article will explain in detail how to set JDK environment variables in java, Xiaobian thinks it is quite practical, so share it with you as a reference, I hope you can gain something after reading this article.
Install, configure j2sdk:
Run j2sdk installer, customize the path, our installation path is: C:j2sdk1.4.2_04
Configure j2sdk:
Configure environment variables:
Add the following environment variables to My Computer-> Properties-> Advanced-> Environment Variables-> System Variables:
JAVA_HOME=C:j2sdk1.4.2_04
CLASSPATH=.; C:j2sdk1.4.2_04lib ools.jar;C:j2sdk1.4.2_04libdt.jar;C:j2sdk1.4.2_04
in;
path=C:j2sdk1.4.2_04in;
Write a simple java program to test whether the J2SDK has been installed successfully:
public class hello
{
public static void main(String args[])
{
System.out.println("Hello");
}
}
Save the program as a file named hello.java.
Open a command prompt window, go to the directory hello.java is in, and type the following command
javac hello.java
java hello
At this point, if you print hello, the installation is successful. If you do not print this sentence, carefully check whether the above configuration is correct.
Note: Make sure "Hide extensions of known file types" is unchecked in the system folder option
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