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JavaScript: The Definitive Guide

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JavaMethod Object

Name

JavaMethod Object---JavaScript representation of a Java method

Availability

Navigator 3.0

Synopsis

javamethod(...)   invoke an instance method

Description

The JavaMethod object is a JavaScript representation of a Java method. It is the part of LiveConnect that implements the functionality that allows JavaScript to invoke class and instance methods accessed through the JavaClass and JavaObject objects. See Chapter 19, LiveConnect: JavaScript and Java for full details.

Usage

Bear in mind that Java is a typed language. This means that the arguments passed to a JavaMethod must be compatible with the type of the expected arguments. If arguments of the wrong type are passed, a JavaScript error will occur.

Example

java.lang is the name of a JavaPackage. It contains the JavaClass java.lang.System This class has a property out which is an JavaObject. This JavaObject has a property println, which is a JavaMethod. LiveConnect allows us to invoke this Java method using JavaScript syntax with code like the following:

java.lang.System.out.println("Hello from Java!");
The line of code above will write a message on the Java console. (See the Options menu to pop up the Java console in Navigator 3.0.)

See Also

"getClass()", "java", "JavaArray", "JavaClass", "JavaObject", "JavaPackage", "Packages", Chapter 19, LiveConnect: JavaScript and Java


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