"arraySize" is a constant.
int arraySize = Integer.parseInt(input.trim());
int[] list = new int[arraySize];
for (int i = 0; i < list.length; i++) {
list[i] = i+1;
}
String values = "";
for(int i = 0; i < list.length; i++) {
values += list[i];
if(i < list.length-1)
values += ", ";
if((i + 1) % 40 == 0)
values += "\n";
}
JOptionPane.showMessageDialog(frame, values + " " +...