如何在JOptionpane中按用户的拆分大小显示拆分字符串

String input = JOptionPane.showInputDialog(null, "请输入要拆分的字符串：");

String sizeInput = JOptionPane.showInputDialog(null, "请输入拆分大小：");
int size = Integer.parseInt(sizeInput);

int length = input.length();
int startIndex = 0;
int endIndex = size;
String result = "";

while (startIndex < length) {
    if (endIndex > length) {
        endIndex = length;
    }
    String substring = input.substring(startIndex, endIndex);
    result += substring + "\n";
    startIndex += size;
    endIndex += size;
}

JOptionPane.showMessageDialog(null, "拆分结果：\n" + result);