Question

I’m writing a program that add a substring to a black or a white string based on 1 main string.
The mainstring is: milk,paper,cup:,coffee,cola,PC

I want the code to place all the character before the “:” in the white string and all the characters after the “:” in the black string.

The problem is that it adds all the items to the black string except for the one witch is connected to the “:”. So in this case “cup”.

This is my code:

String White = "";
String Black = "";
String[] temp = "milk,paper,cup:,coffee,cola,PC".split(",");
int q = 0;
Boolean black = false;
while (q < temp.length) {
    if (temp[q].isEmpty()) {
    } else if (temp[q].contains(":")) {
        String tempWhite = White;
        White = tempWhite + temp[q].replace(":", "") + ",";
        black = true;

    } else if (black = true) {
        String tempBlack = Black;
        Black = tempBlack + temp[q] + ",";
    } else if (black = false) {
        String tempWhite = White;
        White = tempWhite + temp[q] + ",";
    } else if (temp[q].contains(" ")) {
    } else {
        System.out.println(temp[q]);

    }

    q++;
}
System.out.println("White: " + White);
System.out.println("Black: " + Black);

Output I get:
White: cup,
Black: milk,paper,coffee,cola,PC,

Output I want:
White: milk,paper,cup
Black: coffee,cola,PC

I made the script compilable for easy checking 🙂

Greetings and Thanks in advance,

Bram

Answer 1

split on “:” : [0] will be White, [1] Black .

Otherwise, use StringBuilder(), and method .append(..)