Eclipse has been running computing Additional Info

The reason is that the content assist function is used. eclipse will find the Java source code, first find it locally, and then find it on the Internet. By default, Java source code is unavailable locally. Computing Additional Info indicates the source code of Java on the Internet.

Solution:

1. Find the src.zip file under the JDK installation directory;

2. Open Eclipse: Window Menu-> preference-> JAVA-> installed jres;

3. Select the JRE you are using in eclipse in the list, and then edit;

4. Select Rt. jar and click "Source attachment". In the displayed dialog box, select "external file". Then, associate the src.zip file under your JDK installation directory with rt. jar.

Http://blog.163.com/fll_0601/blog/static/54999882011013102648184/