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This article shows you how to install Java on Mac OSX, and also how to do Java/JDK version switching.
The Java SE Development Kit 8 lets you develop and deploy Java applications on desktops and servers, as well as in today's demanding embedded environments. Java offers the rich user interface, performance, versatility, portability, and security that today’s applications require. 1 thought on “ How to trust a certificate in Java on Mac OS X ” Evan T April 7, 2013 at 10:18 am. FYI, the keystore password is changeit on OSX 10.8.3. But if you just want to download the server certificate, there is no need to specify -showcerts. Echo -n gives a response to the server, so that the connection is released. Sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' removes information about the certificate chain and connection details. This is the preferred format to import the. Add certificate in Java on macOS. Includes examples. Java 2 Standard Edition SDK (J2SE SDK) To develop desktop Java applications or if you need a Java Runtime Environment (JRE) you can use the Java 2 Standard Edition Software Development Kit (J2SE SDK).
Tested with
- Mac OS 10.15.3
- JDK 8, 9, 10, 11, 12, 13 (AdoptOpenJDK)
Note
On Mac OSX, Java should installed in this folder; it is Mac’s standard.
We will show you two ways to install Java JDK on Mac, via the popular Homebrew package manager and manually installation.
1. Homebrew
1.1 Install Homebrew and update it.
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1.2 Add adoptopenjdk/openjdk.
1.3 Find all available JDK.
The output may vary.
1.4 Java 8, 9, 10, 11, 12, 13, choose one to install.
This example will install Java 8 and 11 for testing.
1.5 Where Java is installed? /usr/libexec/java_home -V
Homebrew will install the JDK at folder /Library/Java/JavaVirtualMachines/
, and this folder is Mac’s standard folder for Java installs.
1.6 Test it, by default, Mac takes the highest version.
1.7 How to do version switching? Refer to below 3. version switching
2. Manual installation
The example shows you how to download the early access JDK 14 and install it on Mac OSX.
Steps
- Download JDK.
- Puts the JDK folder at
/Library/Java/JavaVirtualMachines
. - Export
JAVA_HOME
.
2.1 Download the early access JDK 14 from the OpenJDK website.
2.2 Extracts tar file to /Library/Java/JavaVirtualMachines
2.3 Export JAVA_HOME
.
Find out where is JDK 14.
Create or edit the existing ~/.bash_profile
with a text editor.
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Export JAVA_HOME
, save and exit.
~/.bash_profile
Reflect the changes
2.4 Test it.
3. Version Switching
In this tutorial, we installed the Java 8 and Java 11 via Homebrew
(Step 1), and Java 14 manually (Step 2), so this Mac has three versions now. And the Mac is using the JDK 14.
Note
There are tools like jEnv to manage the Java version switching, but I prefer to manage with export JAVA_HOME
manually, it’s simple and easy to understand, no black box magic.
3.1 Create or edit the existing ~/.bash_profile
with a text editor like vim or nano, export JAVA_HOME
to the specified JDK we want to use on Mac.
The above changes will make JAVA_HOME
point to JAVA 8.
3.2 Reflect the changes.
Done.
If we want to switch JDK version again, update the ~/.bash_profile
and export JAVA_HOME
to other JDK version.
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References
Tags : beginnerinstall jdkinstall-javamac
Install Java For Mac
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To develop desktop Java applications or if you need a Java Runtime Environment (JRE) you can use the Java 2 Standard Edition Software Development Kit (J2SE SDK). The latest J2SE SDK version can be downloaded from: http://java.sun.com/j2se/
Quick guides
Add certificate in Java on macOS Information I was using the ant get task to get files from https://www.mobilefish.com/.. The ant task shows the following error message: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.ssl.Alerts.getSSLException(Alerts.java:192) To solve this problem you need to add the SSL certificate to the Java keystore. Operating system used macOS (Sierra) 10.12.3 Software prerequisites Java on macOS Procedure- The Java keystore is located at.
Type: echo $JAVA_HOME/jre/lib/security The Java keystore is the file: $JAVA_HOME/jre/lib/security/cacerts Note: This means that every installed java version has its own cacerts file. If you use another java version you need to reinstall the certificate.
- To show all certificates installed in the keystore.
Type: cd $JAVA_HOME/jre/lib/security Type: keytool -list -keystore cacerts The keystore password is (default): changeit You should see: Enter keystore password: Keystore type: JKS Keystore provider: SUN Your keystore contains 104 entries verisignclass2g2ca [jdk], Aug 25, 2016, trustedCertEntry, Certificate fingerprint (SHA1): B3:EA:C4:4 : Note: If you want to see more detailed information, add the -v flag. Type: keytool -list -v -keystore cacerts
- Before you import the certificate in the keystore make a backup of the keystore.
Type: cd $JAVA_HOME/jre/lib/security Type: sudo cp cacerts cacerts.orig
- Import your self signed certificate in the keystore.
Type: cd $JAVA_HOME/jre/lib/security Type: sudo keytool -importcert -alias domain -file /path/to/certificate.crt -keystore cacerts For example, type: sudo keytool -importcert -alias sand.mobilefish.com -file /etc/apache2/ssl/sand.mobilefish.crt -keystore cacerts You should see: Password: your_root_password Enter keystore password: changeit Owner: [email protected], CN=sand.mobilefish.com, OU=Research and development, O=Mobilefish.com, L=Zaandam, ST=Noord-Holland, C=NL Issuer: [email protected], CN=sand.mobilefish.com, OU=Research and development, O=Mobilefish.com, L=Zaandam, ST=Noord-Holland, C=NL Serial number: 8a7362fba9376522 Valid from: Fri Aug 25 13:04:25 CEST 2017 until: Mon Aug 23 13:04:25 CEST 2027 : Trust this certificate? [no]: yes Certificate was added to keystore More information about the keytool. Type: keytool -help
- To check if the certificate is stored is the keystore.
Type: cd $JAVA_HOME/jre/lib/security Type: sudo keytool -list -keystore cacerts -alias sand.mobilefish.com You should see: Enter keystore password: changeit sand.mobilefish.com, Aug 26, 2017, trustedCertEntry, Certificate fingerprint (SHA1): 35:BB:57:11:56:55:12:FF:23:98:22:11:2D:22:00:24:A2:78:77:2 Note: If you want to see more detailed information, add the -v flag. Type: sudo keytool -v -list -keystore cacerts -alias sand.mobilefish.com
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