JEE: enterprise application development

It is also the most widely used field of JAVA, which is mainly used to develop various management systems, such as the general smart card resource management system of China Mobile, the national power material management system, the information platform management system of State Taxation Administration of The People's Republic of China and so on.

JSE: Desktop Application Development

Because JAVA is inseparable from JAVA virtual machine, and the graphics processing speed is too slow, it is rarely used here.

Most desktop programs are made of VC++ and VB, such as QQ, MSN and so on.

JME:JAVA is tailor-made for microsystems.

The JAVA software in the mobile phone is JME.

But SUN Company has been acquired by oracle, and Apache Foundation has also withdrawn from the JAVA community. The prospect is not optimistic.