Java Array

Classic Servoy
1

Hello all :-)

How can I work with a Java Array from Servoy (JavaScript).

I’ve tried with

var widths = java.lang.reflect.Array.newInstance(java.lang.Number, 5);

but I don’t knnow how to populate widths variable

One more thing. In Servoy 5.x the sentence java … had autocompletion, in Servoy 6.x has not, and the following warning appears

The function newInstance(java.lang.Class,Number) is not applicable for the argumetns (Class<java.lang.Number>,Number)

Best regards. Roberto Blasco.

2

Why do you want to create a Java array in the first place? What type of Array should it be?

3

Try this:

	var widths = java.lang.reflect.Array.newInstance(java.lang.Class.forName("java.lang.Number"), 5);
	widths[0] = 3;
	widths[1] = 43;
	widths[2] = 21;
	widths[3] = 33;
	widths[4] = 55;
	widths[6] = 44;

Then examine the contents of each width and widths.length in the debugger!

4

Hi Patrick.

I want to reuse the methods from a Java Object I get from a plugin I’m developing. One of this methods needs a Java Array to be initialized.

That’s why I need a Java array :D

Hi tparry

I’ve tried your code, but Servoy throws this exception

The choice of Java constructor setWidths matching JavaScript argument types ([Ljava.lang.Number;) is ambiguous; candidate constructors are:
void setWidths(float)
void setWidths(int) (C:\Users\roberto\Programas\servoy.6\servoy.workspace.pericias.central.v2\rj_pericias_central_v2\forms\menu_casos.js#65)
The choice of Java constructor setWidths matching JavaScript argument types ([Ljava.lang.Number;) is ambiguous; candidate constructors are:
void setWidths(float)
void setWidths(int) (C:\Users\roberto\Programas\servoy.6\servoy.workspace.pericias.central.v2\rj_pericias_central_v2\forms\menu_casos.js#65)
at C:\Users\roberto\Programas\servoy.6\servoy.workspace.pericias.central.v2\rj_pericias_central_v2\forms\menu_casos.js:65 (onAction)

This is the code I’m trying

	var jdoc = plugins.iTextRTF.JDoc();		// Initialize plugin
	jdoc.initDoc();							// Initialize doc
	var doc = jdoc.getDoc();				// Get Java Document Object
	doc.open();								// Open doc to be written
	var table = itext.Table(3);				// Get Java Table Object
	// Java Array to set the Table widths
	var widths = new java.lang.reflect.Array.newInstance(java.lang.Number, 5);
	widths[0] = 1;
	widths[1] = 2;
	widths[2] = 2;
	table.setWidths(widths);				// Table widths

Whre doc and table are Java Objects.

Thanks a lot for the replies :-)

5

I’d rather change the setter for widths. Change it to take an Object and then have your JS method just pass a JS array. Many plugins work with arrays and they do not need to be native Java arrays.

6

or, if you already know you expect Numbers simply do in your plugin

public void js_setWidths(Number widths)

then you can do

var vArray = [1, 2, 3, 4, 5]
table.setWidths(vArray)

7

Thanks patrick

I’m gonna try it