gistfile1.java

// Read input from the console
public void readFromConsole()
{
	Scanner console = new Scanner(System.in);
	while (console.hasNext())
	{
		// Do something
	}
	console.close();
}

/*
Read input from an arbitary file.

Reading from a file MUST be caught, else the compiler will have a heart attack. 
You can't say with 100% certainty that the file will always be there. Note: there's
other exceptions you can catch besides the FileNotFoundException.
*/
public void readFromFile()
{
	try
	{
		Scanner file = new Scanner(new File("file.txt"));
		while (file.hasNextLine())
		{
			// Do something
		}
		file.close();
	}
	catch (FileNotFoundException exception)
	{
		// Handle the exception
	}
}