Remove Switch case by a for?

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Remove Switch case by a for?

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#1 by (0 votes)
#2 by (0 votes)

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I do not know how to face the following:

I have the following code part:

  for(int i = 0; i < 2; i++){
            ArrayList<String> dade = new ArrayList<String>();
            switch (i) {
                case 0:
                    dade.add(new String("1-"));
                    dade.add(new String("a)"));
                    break;
                case 1:
                    dade.add(new String("2-"));
                    dade.add(new String("b)"));
                    break;
            }
            dades.add(dade);
        }

The idea is to fill the array strings with 2 data. I mean the screen now shows me the following

1- a)

2- b)

The problem is that I do not want it to be using Switch / Case since the data has to be filled in manually. And I do not want there to be a maximum ..

How can I do it? I know it's a long question but I do not know how to put it.

The user will enter two data and it will be placed in a recyclerView.

That is, the result of the screen is the following, which is what I need. The problem is that these data are entered by the user and I have a swtich case. I hope to explain better now.

thanks!

java android-studio

asked by Montse Mkd 16.10.2018 в 15:33

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2 answers

Problem java.lang.nullpointerexception [duplicated] To pass a program to execute in commands to have a better visual aspect [closed]

score 0 · Answer 1

/*Lo que hace el siguiente codigo es agregar de manera automatica (hasta un limite de 27) las letras en el orden que pide:
1-a)
2-b) 
etc.
Se crear un arreglo con las letras necesarias:*/
    String[] abc = new String{"a","b","c",....};
/*    Agregas un limite para el for Puse 27 por las letras del abecedario*/

        for(int i = 0; i < 27; i++){
                ArrayList<String> dade = new ArrayList<String>();
/*Aqui se hace una contatenacion de los datos, (i+1) es para que que no empiece a contar desde el 0.*/


  dade.add(new String((i+1) +"-" +abc[i] + ")"));
            dades.add(dade);
        }

score 0 · Answer 2

I do not finish understanding your question,
You need to be able to make a list of lists with 2 values with the X-Y format) where X is number and Y is a letter of the alphabet, right?

for(int i = 0; i < size; i++){
    ArrayList<String> dade = new ArrayList<String>();
    dade.add(String.valueOf((i+1)+"-"));
    if(i+65<=90){
        dade.add(String.valueOf(((char)(i+65))+")"));
    }else{
        int hlpr = i/26; // cuantas veces nos pasamos de la Z?
        if(hlpr<2){
            String aux = String.valueOf(((char)(hlpr+64)));
            int j = (i - (25*hlpr))+64;
            j = j<0? j*-1 : j;
            aux+=String.valueOf(((char)(j)));
            dade.add(String.valueOf(aux+")"));
        }else{
            //ya si te pasas de 2 veces, quizás necesites una función recursiva para seguir añadiendo Letras
        }
    }
    dades.add(dade);
}

If so, with a cycle more or less like this, you should be able to add letters according to the size delivered, occupying char whose numeric value is governed by the table ASCII