Can't resolve Java Eclipse import -

Can't resolve Java Eclipse import -

i've been trying import third-party source code eclipse project. can't figure out why java file can't reference these classes. i've imported files project, included library in build path, , verified using right bundle name. nonetheless, every time seek utilize 1 of these classes, <classname> cannot resolved type.

in screenshot below, can see in reddish each class reference fails. think import statements right (lines 1-4), don't see why isn't working. can tell me doing wrong? give thanks you!

here i've done regarding build path. if seek add together source, source code i've included crashes immediately.

another approach, based on @guido suggestion below, handle through source tab. however, this, every file in third-party code crashes combination of either the declared bundle "com.flickr4java.flickr" not match expected package or the import com.flickr4java cannot resolved:

illustration of 1 of classes, first error occurs on flickrexception. here third-party code class:

package com.flickr4java.flickr; /** * exception wraps flickr error. * * @author anthony eden */ public class flickrexception extends exception { private static final long serialversionuid = 7958091410349084831l; private string errorcode; private string errormessage; public flickrexception(string errormessage) { super(errormessage); } public flickrexception(string errormessage, throwable rootcause) { super(errormessage, rootcause); } public flickrexception(throwable rootcause) { super(rootcause); } public flickrexception(string errorcode, string errormessage) { super(errorcode + ": " + errormessage); this.errorcode = errorcode; this.errormessage = errormessage; } public string geterrorcode() { homecoming errorcode; } public string geterrormessage() { homecoming errormessage; } }

i have seen happen before in eclispe. of times goes away if click on project , in menu go "project" -> "clean"

here link of things can seek resolve this. have found this post useful

java eclipse import