Console Application

Context

You need a program but have no need for a graphical user interface. A simple text-oriented interface is sufficient or perhaps all input and output takes place with files. Then use a console application.

Example

import becker.io.*;

public class Main
{  public static void main(String[] args)
   {  int largestSoFar = Integer.MIN_VALUE;
      TextInput in = new TextInput("data.txt");
      while (!in.eof())
      {  int i = in.getInt();
         if (i > largestSoFar)
         {  largestSoFar = i; }
      }
      in.close();

      System.out.println("The largest was " + largestSoFar);
   }
} 

Pattern

public class <ClassName>
{  public static void main(String[] args)
   {  <CodeToSolveProblem>
   }
}

Notes

• Every application (but not an applet) must have a method declared public static void main(String[] args). Execution begins with this method.
• Since the main method is declared static, it cannot access any instance variables which happen to be in that class.
• The TextInput class used in the example is not standard Java.
• The example doesn't instantiate any objects. It should go without saying that it may do so and the resulting program may be arbitrarily complex.