如何在lwuit中获得Midlet版本?

Gan*_*esh 3 lwuit midp java-me

我有以下描述的jad文件

MIDlet-Jar-Size: 404071
MIDlet-Jar-URL: test.jar
MIDlet-Name: test
MIDlet-Vendor: Vendor
MIDlet-Version: 1.0.1
MicroEdition-Configuration: CLDC-1.1
MicroEdition-Profile: MIDP-2.0
MicroEdition-test: test
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如何MIDlet-Version通过代码?

我尝试过System.getProperty("MIDlet-Version"),但它返回null.