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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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JavaScript: Tips of the Day

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