File list (Check if you may need any files):
city\.classpath
....\.project
....\src\client\Flat.java
....\...\......\Login.java
....\...\......\Main.java
....\...\......\Obclient.java
....\...\......\Register.java
....\...\......\Residentialarea.java
....\...\......\userinfo.java
....\...\server\Conn.java
....\...\......\DAO.java
....\...\......\Loginserver.java
....\...\......\Login.java
....\...\......\Test2.java
....\...\......\Observer.java
....\...\......\Obtext.java
....\...\......\Residentserver.java
....\bin\server\Test2.class
....\...\......\Residentserver.class
....\...\......\Obtext.class
....\...\......\Observer.class
....\...\......\Loginserver.class
....\...\......\Loginserver$ThreadSocket.class
....\...\......\Loginserver$ThreadSocket$1.class
....\...\......\Login.class
....\...\......\DAO.class
....\...\......\Conn.class
....\...\client\userinfo.class
....\...\......\Residentialarea$3.class
....\...\......\Residentialarea$1.class
....\...\......\Residentialarea.class
....\...\......\Residentialarea$2.class
....\...\......\Register$1.class
....\...\......\Register.class
....\...\......\Obclient.class
....\...\......\Main.class
....\...\......\Main$1.class
....\...\......\Login$3.class
....\...\......\Login.class
....\...\......\Login$2.class
....\...\......\Login$1.class
....\...\......\Flat.class
....\.settings\org.eclipse.jdt.core.prefs
....\.metadata\.lock
....\.........\version.ini
....\.........\.plugins\org.eclipse.core.resources\.root\.indexes\properties.index
....\.........\........\..........................\.....\........\properties.version
....\.........\........\..........................\.....\........\history.version
....\.........\........\..........................\.....\1.tree
....\.........\........\..........................\.safetable\org.eclipse.core.resources
....\.........\........\..........................\.projects\city\.markers
....\.........\........\..........................\.........\....\.indexes\history.index
....\.........\........\..........................\.history\7\20ba4cf24fcd00101ccb99c7a807c081
....\.........\........\............ui.workbench\workingsets.xml
....\.........\........\........................\workbench.xml
....\.........\........\........................\dialog_settings.xml
....\.........\........\............jdt.core\javaLikeNames.txt
....\.........\........\....................\savedIndexNames.txt
....\.........\........\....................\1678345919.index
....\.........\........\....................\4141490421.index
....\.........\........\....................\1483389352.index
....\.........\........\....................\3173370853.index
....\.........\........\....................\4083320474.index
....\.........\........\....................\142866636.index
....\.........\........\....................\3519129897.index
....\.........\........\....................\716381353.index
....\.........\........\....................\3554485948.index
....\.........\........\....................\3644000695.index
....\.........\........\....................\937298175.index
....\.........\........\....................\variablesAndContainers.dat
....\.........\........\....................\externalLibsTimeStamps
....\.........\........\....................\nonChainingJarsCache
....\.........\........\................ui\QualifiedTypeNameHistory.xml
....\.........\........\..................\OpenTypeHistory.xml
....\.........\........\..................\dialog_settings.xml
....\.........\........\............core.runtime\.settings\org.eclipse.jdt.ui.prefs
....\.........\........\........................\.........\org.eclipse.mylyn.context.core.prefs
....\.........\........\........................\.........\org.eclipse.mylyn.monitor.ui.prefs
....\.........\........\........................\.........\org.eclipse.ui.prefs
....\.........\........\........................\.........\org.eclipse.ui.workbench.prefs
....\.........\........\........................\.........\org.eclipse.epp.usagedata.recording.prefs
....\.........\........\........................\.........\org.eclipse.jdt.core.prefs
....\.........\.