键入类时Eclipse IDE挂起

I'm using eclipse (zend studio 11), and it was working fine for quite sometime, but for two days when i type class= as soon as i hit the equals sign it takes about 10 minutes hanging, with no response, after that things just go back to normal. Any ideas?

Zend Studio 11 it's old and unsupported. To find whats going on see this wiki page https://wiki.eclipse.org/How_to_report_a_deadlock. In most cases problem appear with broken DLTK index, so:

1. Close Zend Studio
2. Drop WORKSPACE_LOC/.metadata/.plugins/org.eclipse.dltk.core.index.sql.h2 and/or WORKSPACE_LOC/.metadata/.plugins/org.eclipse.dltk.core.index.lucene
3. Open Zend Studio and wait for indexing

Anyway I strongly suggest switching to upcoming Eclipse Photon. Since this release code completion is asynchronous.