A Simple Client-Server Chat Utility in Java

   In this post I have added the Client and Server Programs in Java to implement a very simple chat utility.

Figure Below Shows the GUI of a Chat Client

Click here to down load the Java Client Program.

Click here to download the Java Server Program.

Java Development Kit (JDK)

  Java Development Kit ( JDK ) contains a collection of programming tools for Java Developers. Here in this post I am discussing about a few useful tools in JDK.

• appletviewer - appletviewer runs Java applets without the help of a java enabled web browser.

• javac - javac is the Java Compiler which produces Byte code from the Java Source code.

• java - java is the Java Interpreter which runs the Byte code produced by the Java Compiler javac.

• javah - javah produces header files to use with native methods.

• javap - javap is the Java Disassembler which enables us to convert Byte code files into a program description.

• javadoc - javadoc creates HTML format documentation from Java Source code files.

• jdb - jdb is the Java Debugger.

Differences between Java and C++

  In this post I am discussing about the main differences between Java and C++. The subject is not covered thoroughly.

• Java is a pure object oriented language, while C++ is basically C with object oriented extension.

• Java does not support operator overloading.

• Java does not have template classes as in case of C++.

• Java does not support multiple inheritance of classes. To achieve multiple inheritance Java uses interface.

• Header files are not there in Java.

• There are no global variables in Java.

• Java does not use explicit pointers.

• In Java destructors are replaced with finalize( ). 

Differences Between Java and C

  In this post I am listing out some differences between Java and C. Of course it does not cover all the differences between Java and C.

• Java is an Object Oriented Programming Language, where as C is a Procedural Programming Language.
• Java does not have the C Keywords sizeof and typedef.
• There are no structures and unions in Java. Consequently the C Keywords struct and union are absent in Java.
• Type Modifiers auto, extern, register, signed and unsigned present in C are not there in Java.
• Explicit pointers are not supported in Java.
• There is no preprocessor for java. So statements like #define, #include etc are absent in Java.
• In Java functions with no argument must be declared with empty parenthesis. In C this can be done by using the void keyword.
• New operators such as >>> and instanceof are added in Java.
• Java supports labelled breaks and continue statements.
• New data types like boolean, reference etc. are added in Java. 
• Many new keywords like private, protected, public etc are added in Java.