Java: How to make the APIs available to all applications

Approach 1: Place the jar file in global classpath.

Approach 2: Place the jar file in ext directory of jre installation.

When java application starts, jre checks for the classes in core system classes (rt.jar file, which is located in jre lib), ext directory of jre and folders from classpath.

In MAC, you can find the ext directory location from here.

/Library/Java/JavaVirtualMachines/{JAVA_VERSION}/Contents/Home/jre/lib/ext

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