by Jonathan Knudsen
June 2004
The award-winning J2ME Wireless Toolkit has become the de facto standard toolkit for developing applications for Java 2, Micro Edition (J2ME). Since its debut in 2000, the toolkit has evolved to keep pace with the rapidly changing face of mobile Java technology. Don't be misled by the small change in version number from 2.1. The new toolkit supports new optional APIs specified through the Java Community Process (JCP) in four vital areas: 3D graphics, multimedia messaging, Bluetooth networking, and data management. In this article I'll describe these new APIs and show you how they're implemented in the toolkit.
Before I do, take a moment to admire the updated DefaultColorPhone emulator skin. Since version 2.1, this skin has gotten a larger screen (320 x 240, or QVGA) and far more colors (4096 instead of 256).
Mobile 3D Graphics
JSR 184, the Mobile 3D Graphics API for J2ME (M3G), provides three-dimensional graphics functionality in a compact package that's appropriate for devices that support the most widely adopted J2ME


作者：Jonathan Knudsen
2004 年 6 月
屢獲殊榮的 J2ME Wireless Toolkit 已經(jīng)成為 J2ME 開發(fā)應(yīng)用程序的事實標準工具包。自從 2000 年初次亮相以來，該工具包一直在發(fā)展以趕上移動 Java 技術(shù)外觀上快速改變的步伐。不要被從 2.1 版本以來的小改變所誤導(dǎo)。新的工具包在四個重要的領(lǐng)域支持　Java Community Process (JCP)　所指定的新的可選 API：3D 圖形、多媒體通信、藍牙連網(wǎng)（Bluetooth networking）和數(shù)據(jù)管理。本文將描述這些新的 API 并且向您展示如何在工具包中實現(xiàn)他們。
在這之前，讓我們贊美一下更新后的 DefaultColorPhone 模擬器皮膚，自從 2.1 版本以來，該皮膚已有了一個更大的屏幕（320 x 240, 或 QVGA）和更多的顏色（4096 色而不是 256 色）。