For those who don't have time to refactor the code to replace arrays with Collections (for example ArrayList), there is an alternative. Unlike Collections, the length of an array cannot be changed, but the array can be replaced, like this:
array = push(array, item);
The drawbacks are that
Object is not changed, so you have to update the variable(s) as appropriate.Here is the push method for String:
(You can create multiple push methods, one for String, one for int, etc)
private static String[] push(String[] array, String push) {
String[] longer = new String[array.length + 1];
for (int i = 0; i < array.length; i++)
longer[i] = array[i];
longer[array.length] = push;
return longer;
}
This alternative is more efficient, shorter & harder to read:
private static String[] push(String[] array, String push) {
String[] longer = new String[array.length + 1];
System.arraycopy(array, 0, longer, 0, array.length);
longer[array.length] = push;
return longer;
}