使用rhino的JavaAdapter的示例 [英] example using rhino's JavaAdapter

问题描述

有人能为我提供一个如何使用Rhino的java适配器在java脚本中扩展java类的示例吗？

Can someone provide me an example on how to extend a java class in java script using Rhino's java adapter ?

推荐答案

其他任何可能遇到此问题的人都有一个不错的例子这里（作者使用它来扩展 awt.Canvas ）。

For anyone else who might come across this, there's a decent example here (the author uses it to extend awt.Canvas).

var smileyCanvas = new JavaAdapter(awt.Canvas, {
   paint: function (g) {
       var size = this.getSize();
       var d = Math.min(size.width, size.height);
       var ed = d / 20;
       var x = (size.width - d) / 2;
       var y = (size.height - d) / 2;
       // draw head (color already set to foreground)
       g.fillOval(x, y, d, d);
       g.setColor(awt.Color.black);
       g.drawOval(x, y, d, d);
       // draw eyes
       g.fillOval(x+d/3-(ed/2), y+d/3-(ed/2), ed, ed);
       g.fillOval(x+(2*(d/3))-(ed/2), y+d/3-(ed/2), ed, ed);
       //draw mouth
       g.drawArc(x+d/4, y+2*(d/5), d/2, d/3, 0, -180);
   }
});

有关MDN的更多信息，包括简要说明和调用语法示例。

There's more information on MDN, including a brief explanation and calling syntax example.

这篇关于使用rhino的JavaAdapter的示例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！