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Kaitlin
Kaitlin asked in Computers & InternetProgramming & Design · 4 years ago

Basic java programing, nested for loops problem?

Alright, say I have a string that's guaranteed to be a length that's a multiple of 4 and it only has the letters A,B,C, and D in it (upper-case). say if I had a string "ABCDDCBA" I want to make an array [ABCD, DCBA]. I'm stuck on this, I figured it looks like a nested for loop problem?

Update:

I also think substrings is apart of it.

public static void arrayProb(String line){

String[] list = new String[line.length()/4];

for(int j = 0; j <= list.length - 1; j++){

for (int i = 0; i <= list.length - 4; i = i + 4){

list[I] = noDash.substring(i , i+4);

}

}

}

This is what I started with but for obvious reasons I have nulls in every index of the array that isn't 0 or a multiple of 4.

2 Answers

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  • heyy =]
    Lv 6
    4 years ago
    Favorite Answer

    you can do it with a nested for loop. But it's not neccesary, especially because java has the substring() method. Here's one solution without.

    String line = "ABCDDCBA";

    String[] list = new String[line.length()/4];

    for(int j = 0; j <= list.length - 1; j++){

    list[j] = line.substring(j*4, j*4+4);

    }

  • Anonymous
    4 years ago

    U

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