HelpJava2

public class Help2 {

        public static void main(String[] args)
                throws java.io.IOException {
            char choice, ignore;
do{
            System.out.println("Справка: ");
            System.out.println("1. if");
            System.out.println("2. switch");
            System.out.println("3. for");
            System.out.println("4. while");
            System.out.println("5. do-while");
            System.out.println("Выберите: ");

            choice = (char) System.in.read();

            do {
                ignore = (char) System.in.read();
            } while (ignore != '\n');
        } while (choice < '1' | choice > '5');
        System.out.println("\n");

            switch (choice){
                case '1' :
                    System.out.println("Оператор if:\n");
                    System.out.println("if(условие) оператор;");
                    System.out.println("else оператор;");
                    break;

                case '2' :
                    System.out.println("Оператор switch:\n");
                    System.out.println("switch(выражение) {");
                    System.out.println(" case константа:");
                    System.out.println(" Последовательность операторов");
                    System.out.println(" break;");
                    System.out.println(" // . . .");
                    System.out.println("}");
                    break;
                case '3':
                    System.out.println("Оператор for:\n");
                    System.out.println("for (инициализация; условие; итерация)");
                    System.out.println(" оператор;");
                    break;
                case '4':
                    System.out.println("Оператор while:\n");
                    System.out.println("while(условие) оператор;");
                    break;
                case '5':
                    System.out.println("Оператор do-while:\n");
                    System.out.println("do {");
                    System.out.println(" оператор;");
                    System.out.println("} while(условие)");
                    break;





            }


        }


}