Menu.java

//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 < '1' | choice > '5');
				
				System.out.println("\n");
				
				switch(choice){
					case '1':
						System.out.println("The if: \n ");
						System.out.println("if(condition) statement; ");
						System.out.println("else statement;");
						break;
					case '2':
						System.out.println("The switch:\n ");
						System.out.println("switch(expression) { ");
						System.out.println("case constant: ");
						System.out.println("     statement sequence ");
						System.out.println("     break; ");
						System.out.println(" //... ");
						System.out.println(" } ");
						break;
					case '3':
						System.out.println("The while:\n ");
						System.out.println("while(condition) statement; ");
						break;
					case '4':
						System.out.println("The do-while:\n ");
						System.out.println("do { ");
						System.out.println("	statement; ");
						System.out.println(" } while (condition); ");
						break;
					case '5':
						System.out.println("The for:\n ");
						System.out.println("for(int i;condition;iteration) ");
						System.out.println(" statement ; ");
						break;
			}
		}
	}