Old man, four open-source technical schools in Java, I don't know if they have changed.

Java's open-source software has tens of millions of dollars. It is like a river and lake. A powerful and experienced team has formed a gang. After constant competition and elimination, the four major gangs have stood out ......
Top 1: Apache Software Foundation
When I started to learn Java, Apache's Jakarta sub-project was still very weak. Apache's first brand was Apache httpd server (which is still the first brand so far), and now it has become the largest group in the world. There is a huge volume of Apache power, and there are many large manufacturers behind it. For example, if IBM has funded several Apache projects, sun works closely with tomcat, while BEA has invested heavily in beehive. With the support of government departments, Apache naturally became the first major group. However, the problem with Apache is that the organizational unit members are too complicated. Its various projects come from Sanshan Wuyue, Which is uneven. Even the children under different departments often have conflicts and are undisciplined. For example, ant is the top card of the building tool, and Maven is also the first card of the building tool; OJB is the top card of the persistent layer, but torque is not willing to give up his position. He hasn't arranged his seat yet, ibatis also needs to be added to helper ......
I don't have any good feelings for such an unorganized and self-conflicted hacker group. Besides the hacker group, there are several excellent Disciples from time to time, such as log4j, ant, and common, he is destined to never become a martial arts leader.

Second largest help: Shaolin eclipse Foundation
Eclipse is not a small one. It comes directly from IBM and has been supported by many vendors in the industry. Due to the strong support of government officials, it is very likely that eclipse will become the owner of the martial arts. Every sub-project under eclipse is also proficient in SWT, EMF, GEF, RCP, and SDO. The most important thing is that eclipse is the foundation of wsad. Many IBM developers directly develop for Eclipse, which means that the gang and Government will work in concert directly. After IBM puts the rose xde function into eclipse, it's just around the corner.

Third party: Wudang JBoss Inc
JBoss is a mass crowd with no help and no support from Shaolin Government. However, through its own efforts, JBoss has become a top-level gang in the rivers and lakes and has a great say. JBoss is characterized by martial arts, and each of its sub-projects has a very powerful strength. However, each sub-project can form an organic whole to form a battle and exert unexpected power,

Help 4: Emei opensymphony
Opensymphony is not comparable to the above three gangs, but she is unique and has few disciples, but each of them has exclusive lives. Therefore, she has gained a firm foothold in Wulin. Oscache-Cache framework