Based on a simple Java TCP and UDP Socket Programming. First start the Server, and then start the Client, and then enter a string of lowercase characters in the Console, the system will return a string of uppercase characters.

test\.classpath
....\.project
....\bin\ChatClient$1.class
....\...\ChatClient$RecvThread.class
....\...\ChatClient$TFListener.class
....\...\ChatClient.class
....\...\ChatServer$Client.class
....\...\ChatServer.class
....\...\ChatTCPServer.class
....\...\ChatTCPSocketJFrame.class
....\...\ClientSocket.class
....\...\ClientTest.class
....\...\ServerTest.class
....\...\TCPClient.class
....\...\TCPServer.class
....\...\UDPClient.class
....\...\UDPServer.class
....\...\WebServer.class
....\src\TCPClient.java
....\...\TCPServer.java
....\...\UDPClient.java
....\...\UDPServer.java
....\bin
....\src
test

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