Code:

//Upotreba petlje do-while za obradu izbora iz menija
public class Meni 
{
    public static void main(String args[])
    throws java.io.IOException
    {
        char izbor;
        
        do
        {
            System.out.println("Pomoc za:");
            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("Izaberite samo jedno:");
            izbor=(char) System.in.read();
        }
        while(izbor < '1' || izbor > '5');
        
        System.out.println("\n");
        
        switch(izbor)
        {
        case '1':
            System.out.println("Naredba if:\n");
            System.out.println("if(uslov) naredba;");
            System.out.println("else naredba;");
            break;
        case '2':
            System.out.println("Naredba switch:\n");
            System.out.println("switch(izraz) {");
            System.out.println("   case konstanta:");
            System.out.println("   niz naredbi");
            System.out.println("  break;");
            System.out.println("  //  ...");
            System.out.println("}");
            break;
        case '3':
            System.out.println("Naredba while:/n");
            System.out.println("while(uslov) naredba;");
            break;
        case '4':
            System.out.println("Naredba do-while:\n");
            System.out.println("do {");
            System.out.println("  naredba");
            System.out.println("} while(uslov);");
            break;
        case '5':
            System.out.println("Naredba for:\n");
            System.out.println("for(inicijalizacija; uslov; iteracija)");
            System.out.println(" naredba;");
            break;
            
        }
    }

}