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//  Using a do-while to process a menu selection
 
class Menu
{
	public static void main(String args[])
	throws java.io.IOException
	{
		char choice;
		do
		{
			System.out.println("Help on:");
			System.out.println("   1.  if");
			System.out.println("   2.  switch");
			System.out.println("   3.  while");
			System.out.println("   4.  do-while");
			System.out.println("   5.  for\n");
			System.out.println("Choose one: ");
			choice = (char) System.in.read();
		} while(choice <  ' || choice > '5');
		System.out.println("\n");