File list (Check if you may need any files):
ClientEnd
.........\.classpath
.........\.project
.........\.settings
.........\.........\org.eclipse.jdt.core.prefs
.........\bin
.........\...\MutiUser
.........\...\........\Client$ClientMsgSendThread.class
.........\...\........\Client$ServerMsgCollectThread.class
.........\...\........\Client.class
.........\src
.........\...\MutiUser
.........\...\........\Client.java
SeverEnd
........\.classpath
........\.project
........\.settings
........\.........\org.eclipse.jdt.core.prefs
........\bin
........\...\MutiUser
........\...\........\Server$ClientMsgCollectThread.class
........\...\........\Server$ServerMsgSendThread.class
........\...\........\Server.class
........\src
........\...\MutiUser
........\...\........\Server.java