JavaFX 25 · netscape.javascript.JSObject · APIdia, the JavaDoc alternative

Allows Java code to manipulate JavaScript objects.

When a JavaScript object is passed or returned to Java code, it is wrapped in an instance of JSObject. When a JSObject instance is passed to the JavaScript engine, it is unwrapped back to its original JavaScript object. The JSObject class provides a way to invoke JavaScript methods and examine JavaScript properties.

Any data returned from the JavaScript engine to Java is converted to Java data types. Certain data passed to the JavaScript engine is converted to JavaScript data types.

Access	Constructor and Description
protected	JSObject() Constructs a new JSObject.

Method Summary

Modifier and Type	Method and Description
public abstract Object	Returns: Result of the method. call(String The name of the JavaScript method to be invoked. methodName, Object... the Java objects passed as arguments to the method. args) Calls a JavaScript method.
public abstract Object	Returns: Result of the JavaScript evaluation. eval(String The JavaScript expression. s) Evaluates a JavaScript expression.
public abstract Object	Returns: The value of the property. getMember(String The name of the JavaScript property to be accessed. name) Retrieves a named member of a JavaScript object.
public abstract Object	Returns: The value of the indexed member. getSlot(int The index of the array to be accessed. index) Retrieves an indexed member of a JavaScript object.
public abstract void	removeMember(String The name of the JavaScript property to be removed. name) Removes a named member of a JavaScript object.
public abstract void	setMember(String The name of the JavaScript property to be accessed. name, Object The value of the property. value) Sets a named member of a JavaScript object.
public abstract void	setSlot(int The index of the array to be accessed. index, Object The value to set value) Sets an indexed member of a JavaScript object.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Constructor Detail

JSObject	back to summary
protected JSObject() Constructs a new JSObject. Users should neither call this method nor subclass JSObject.

Method Detail

call	back to summary
public abstract Object call(String methodName, Object... args) throws JSException Calls a JavaScript method. Equivalent to "this.methodName(args[0], args[1], ...)" in JavaScript. Parameters methodName:String The name of the JavaScript method to be invoked. args:Object[] the Java objects passed as arguments to the method. Returns:Object Result of the method. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

call

back to summary

public abstract Object call(String methodName, Object... args) throws JSException

Calls a JavaScript method. Equivalent to "this.methodName(args[0], args[1], ...)" in JavaScript.

Parameters

methodName:String: The name of the JavaScript method to be invoked.
args:Object[]: the Java objects passed as arguments to the method.

Returns:Object

Result of the method.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

eval	back to summary
public abstract Object eval(String s) throws JSException Evaluates a JavaScript expression. The expression is a string of JavaScript source code which will be evaluated in the context given by "this". Parameters s:String The JavaScript expression. Returns:Object Result of the JavaScript evaluation. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

eval

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public abstract Object eval(String s) throws JSException

Evaluates a JavaScript expression. The expression is a string of JavaScript source code which will be evaluated in the context given by "this".

Parameters

s:String: The JavaScript expression.

Returns:Object

Result of the JavaScript evaluation.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

getMember	back to summary
public abstract Object getMember(String name) throws JSException Retrieves a named member of a JavaScript object. Equivalent to "this.name" in JavaScript. Parameters name:String The name of the JavaScript property to be accessed. Returns:Object The value of the property. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

getMember

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public abstract Object getMember(String name) throws JSException

Retrieves a named member of a JavaScript object. Equivalent to "this.name" in JavaScript.

Parameters

name:String: The name of the JavaScript property to be accessed.

Returns:Object

The value of the property.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

getSlot	back to summary
public abstract Object getSlot(int index) throws JSException Retrieves an indexed member of a JavaScript object. Equivalent to "this[index]" in JavaScript. Parameters index:int The index of the array to be accessed. Returns:Object The value of the indexed member. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

getSlot

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public abstract Object getSlot(int index) throws JSException

Retrieves an indexed member of a JavaScript object. Equivalent to "this[index]" in JavaScript.

Parameters

index:int: The index of the array to be accessed.

Returns:Object

The value of the indexed member.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

removeMember	back to summary
public abstract void removeMember(String name) throws JSException Removes a named member of a JavaScript object. Equivalent to "delete this.name" in JavaScript. Parameters name:String The name of the JavaScript property to be removed. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

removeMember

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public abstract void removeMember(String name) throws JSException

Removes a named member of a JavaScript object. Equivalent to "delete this.name" in JavaScript.

Parameters

name:String: The name of the JavaScript property to be removed.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

setMember	back to summary
public abstract void setMember(String name, Object value) throws JSException Sets a named member of a JavaScript object. Equivalent to "this.name = value" in JavaScript. Parameters name:String The name of the JavaScript property to be accessed. value:Object The value of the property. Exceptions JSException: when an error is reported from the browser or JavaScript engine.

setMember

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public abstract void setMember(String name, Object value) throws JSException

Sets a named member of a JavaScript object. Equivalent to "this.name = value" in JavaScript.

Parameters

name:String: The name of the JavaScript property to be accessed.
value:Object: The value of the property.

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

setSlot	back to summary
public abstract void setSlot(int index, Object value) throws JSException Sets an indexed member of a JavaScript object. Equivalent to "this[index] = value" in JavaScript. Parameters index:int The index of the array to be accessed. value:Object The value to set Exceptions JSException: when an error is reported from the browser or JavaScript engine.

setSlot

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public abstract void setSlot(int index, Object value) throws JSException

Sets an indexed member of a JavaScript object. Equivalent to "this[index] = value" in JavaScript.

Parameters

index:int: The index of the array to be accessed.
value:Object: The value to set

Exceptions

JSException:: when an error is reported from the browser or JavaScript engine.

public abstract Class JSObject

Constructor Summary

Method Summary

Constructor Detail

Method Detail