The Java virtual machine (JVM) is a program whose sole purpose is to execute other programs. This simple idea has made Java one of the most successful and long-lived platforms of all time.

Java 如何 Jar、exe及安装 一、用Eclipse生产Jar 首先，看一下我的项目的目录结构： 1，项目名字上面点右键，选择Export，在选择java\JAR file，下一步；如下图： （2），选择，src 夹，.classpath和.project可以去掉不选。