Javascript : Java object, JavaArray, JavaClass, JavaObject, JavaPackage, Packages, sun, netscape
Java object
Java object is a top-level, predefined JavaScript object used to access java classes.
JavaArray
Javaarray object is an instance of a java array.
Can be created by any java method which creates an array or by using newInstance method of the array class.
JavaClass
A JavaScript reference to a Java class.
Can be created by a reference to the class name used with the Packages object.
JavaObject
The type of a wrapped Java object accessed from within JavaScript code.
Any Java method which returns an object type. In addition, you can explicitly construct a JavaObject using the object's Java constructor with the Packages keyword: new Packages.JavaClass(parameterList) where JavaClass is the fully-specified name of the object's Java class.
JavaPackage
A JavaScript reference to a Java package.
Can be created with a reference to the package name used with the Packages keyword.
Packages, sun, netscape
Packages
Packages is a built-in object used to access Java classes from within JavaScript code.
Syntax>
Packages.packagename
Properties of the Packages object
Name | Description |
---|---|
classname | Name of Java class in a package. |
java | Represent the core Java classes. |
netscape | Represent a set of Netscape classes. |
sun | Represent the core Sun classes |
sun
The sun object is predefined JavaScript object,is used to access any Java class in the package sun.*.
netscape
The netscape object is predefined JavaScript object, used to access any Java class in the package netscape.*.
Can be created by a reference to the class name used with the Packages object.
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How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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