Using a do-while to process a Menu Selection

Here is a Java Program to Using a do-while to process a menu selection -- a simple help system.

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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.print("for(init; condition; iteration)");         System.out.println(" statement;");         break;     }   } }

Output of Above Java Program
Help on:
1. if
2. switch
3. while
4. do-while
5. for

Choose one:
4


The do-while:

do {
statement;
} while (condition);