java - 如何按用户的分割大小在 JOptionpane 中显示分割字符串

Question

您好，如何在 JOptionPane 中显示我的拆分字符串？我的窗口不断打印/显示我的字符串 1 by 1 ，我希望它们根据用户的分割大小打印/显示

    String letters, splitSize;

    letters = JOptionPane.showInputDialog("Enter String: ");
    final int numInLetters = letters.length(); 

    splitSize = JOptionPane.showInputDialog("Enter Split Size");
    int sizeSplit = Integer.parseInt(splitSize);

    if (numInLetters % sizeSplit == 0) {

        JOptionPane.showMessageDialog(null, "The Given String is" + letters);
        JOptionPane.showMessageDialog(null, "The Split String are: ");

        String []in_array;

        in_array = letters.split("");
        for (int i = 1; i <= in_array.length; i++) {


                    //what alternative way to show my split string here given by user's split size
            JOptionPane.showMessageDialog(null, in_array[i-1]);         


         if (i % sizeSplit == 0) {

            JOptionPane.showMessageDialog(null, "");

Answer 1

我不太确定你想要完成什么，但我认为这可能就是你想要的:

String letters = JOptionPane.showInputDialog("Enter String: ");

String splitSize  = JOptionPane.showInputDialog("Enter Split Size");
int sizeSplit = Integer.parseInt(splitSize);

List<String> list = new ArrayList<>();
int idx = 0;
while (idx < letters.length()) {
    int toIdx = Math.min(idx + sizeSplit, letters.length());
    list.add(letters.substring(idx, toIdx));
    idx = toIdx;
}

JOptionPane.showMessageDialog(null, "The Split String are: " + System.lineSeparator() + String.join(System.lineSeparator(), list));