A problem wtih my loop!! please have a look !!

Question

this is the first node for the program master mind
Actually i need to enter a string, then i need to check whether its of 4 characters and if all letters are in the liste( a,b,c,d,e,f)
until these 2 conditions are nt satisfied , i need to continue to accept strings from keyboard.
so here i did a lot of manipulations, i know tat some are useless, they r just to help me to understand much better
so if u can find a solution; please do help me , coz im really getting mad
thank you!!!
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!MASTER MIND !!!!!!!!!!!!!!!!!!!!!!!!!!!!
int nbEchecs=0,nbpresent=0,j;int nbtrouves =0;int nblettre;int
nIndices=0;int i,c=0,k=0,h=0,p=0;int nbtrouves2=0, nbtrouves1 =0;
        boolean bgagne,bAbsent;bgagne=false;
        boolean present,pluslong=false;
        String cmot1,cLettre;
              char [] cDevine  = new char[10];
              char [] cLettres = new char[26];
              char [] couleurs  = {'A','B','C','D','E','F'};
BufferedReader clavier = new BufferedReader(new
InputStreamReader(System.in));
              System.out.println("Entrer la combinaison secrete a deviner avec le code A, B, C, D, E, F");
              cmot1=clavier.readLine();
              nblettre=cmot1.length();
              cmot1=cmot1.toUpperCase();
              cDevine = cmot1.toCharArray();
              present=true;
//********  to check if it the colors are from a to f n length is 6
               do
                  if(cmot1.length()!=4)
                  pluslong=true;
                  else
                  pluslong=false;
                  for(k=0;k<nblettre;k++)
                  for(int g=0;g<6;g++)
                             if(cDevine[k]!=couleurs[g])
                              c=c+1;
                  if(c>1)
                      present=false;
                  else
                      present=true;
              if(present==false || pluslong==true)
                 System.out.println("Il y a plus que 4 characteres ou Vous avez rentrez une couleur qui nest pas valide!!!");
                 System.out.println("Recommencer, entrer une combinaison");
                 cmot1=clavier.readLine();
                 cmot1=cmot1.toUpperCase();
                 cDevine = cmot1.toCharArray();
                 nblettre=cmot1.length();
            }while(present==true && pluslong ==false);

Answer 1

Hey if u dont mind can u explain me how this loop works? Mind if i do?
int count= 0;
// char's are (in a way) just like int's
// This for-loop starts with A then increases
// to B, C, D, E and the last in the line: F
for (char c = 'A'; c <= 'F'; c++) {
    // indexOf(...) is a method from the String class;
    // see http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html
    // indexOf(...) return -1 if a char is NOT in the String 'input'
    // So if a char from your loop (A,B,C,D,E or F) is indeed in the
    // String 'input', then the counter is increased with 1.
    if (input.indexOf(c) >= 0) {
        // you could also do:
        //   count = count + 1;
        // or:
        //   coutn += 1;
        // It's all the same.
        count++;
}