Connect Lotus Script to Java using LS2J

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Introduced in Lotus Notes 6, LS2J allows the use of Java code from Lotus Script. To use LS2J from within Notes, your Lotus Script code must include this line:

This loads the LS2J Dynamic Link Library (DLL) on Win32 and registers all the Application Data Types (ADTs). Lotus Script provides a JavaSession ADT to be used as an instance to connect with the JVM.

The next statement creates a new Java session. If the JVM has not been started, one is created at this time.

LotusScript locates the Java class files in two ways:
– In the Script Libraries that the user specified through the USE statement.
– On the file system as specified in the Notes.ini variable JavaUserClasses.

Besides the LS2J classes used in this example, you may also find classes such as JavaError, JavaMethodCollection, JavaPropertyCollection. For further reading please follow the references link below.

Declare classes explicitly public, to avoid java.lang.InternalError exceptions that occured in later versions of the Notes client when trying to access the public member variables.

LS2J has some limitations due to security reasons:
– Only public methods and fields are available;
– LS2J has the same access rights as a Java program which does not contain a package statement.

References:
LS2J Online Help

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