在循环内访问 B"i" 变量

Question

I am writing Java in Android Studio and I to access differend B variables in the loop. I am not quite sure about the syntax.

int A, B1, B2, B3, B4, B5;
for (i = 0; i++; i <= 20) {
    A=b"i";
}

Answer 1

You cannot access variables like this.
You have to define a List or an array

int A = 0;
int[] myIntArray = {1,2,3,4,5};

for (int i = 0; i < myIntArray.length; i++){
    //Now you can access your array with the index
    A = myIntArray[i]; //This statement still does not make much sense
}

You should read some java beginner tutorials like this one

Answer 2

It is not easy to know what you mean, but I will make a guess.

int A, B1, B2, B3, B4, B5;

    for (int i = 1; i < 6; i++) {
        switch (i) {
            case 1: A = B1;
                    break;
            case 2: A = B2;
                    break;
            case 3: A = B3;
                    break;
            case 4: A = B4;
                    break;
            case 5: A = B5;
                    break;
            default: break;
        }
        someFunction(A);
    }

I don't understand why you have i <= 20 in your loop. Maybe I am missing something.

Answer 3

What i was trying to do :P

    String Url = "";
    int i;

    String [] paper_url;
    paper_url = new String[2];
    paper_url[0] = new String("http://www.google.com");
    paper_url[1] = new String("http://www.yahoo.com");

    for (i=1;i<=2;i++) {
        Url = paper_url[i];
    }