java - What are those different color symbols when we mouseover on methods in eclipse? -

suppose have method returning object. so, when hover on method used in other class, eclipse show popup description method signature , method return.

but, question there little symbol ahead of being return. on different occasion got different shape , color symbol.

i have screen shots of that:

1) green circle shape symbol

2) red square shape symbol

3) yellow diamond shape symbol

so,

• what significance of little symbol?
• why there different color , shape different different methods?
• does symbol give idea method?

the symbols next methods refer access modifiers

• what significance of little symbol?
  green circle public
  red square means private
  yellow diamond protected
  blue triangle means default(package) access

• does symbol give idea method?
  yes, tells can accessed from. more on access modifiers: http://docs.oracle.com/javase/tutorial/java/javaoo/accesscontrol.html