How to make executable jar files in JDK1.3.1?

Instructions for creating an Executable .jar file google_protectAndRun("ads_core.google_render_ad", goo

File I/O and Streams

You can write data to a file instead of the computer screen. You can write certain data to a file while still putting other data on the screen. Or you may need access to multiple files simultaneously. Or you may want to query the user for input rather than accepting it all on the command line. Or maybe you want to read data out of a file that's in a particular format. In Java all these methods take place as streams. < > Using File I/O streams. The System.out.println() statement we've be

Catching Exceptions

An exception is a point in the code where something out of the ordinary has happened and the regular flow of the program needs to be interrupted; an exception is not necessarily an error. A method which has run into such a case will throw an exception using the throw(ExceptionClass) method. When an exception is thrown it must be caught by a catch statement that should sit right after a try statement. // This is the Hello program in Java

Interfaces

There is one thing in Java source code that is neither a class nor a member of a class. That's an interface. An interface defines methods that a class implements. In other words it declares what certain classes do. However an interface itself does nothing. All the action at least, happens inside classes. A class may implement one or more interfaces. This means that the class subscribes to the promises made by those interfaces. Since an interface promises certain methods, a class implemen

Classes and Objects

Following the principles of Object Oriented Programming (OOP), everything in Java is either a class, a part of a class, or describes how a class behaves. Objects are the physical instantiations of classes. They are living entities within a program that have independent lifecycles and that are created according to the class that describes them. Just as many buildings can be built from one blueprint, many objects can be