I have some Class objects in a List that I would like to convert into an array. Below is my code:
private static Class<?>[] getClasses(final Object[] params) {
List<Class<?>> classList = new ArrayList<>();
for (final Object param : params) {
classList.add(param.getClass());
}
return (Class<?>[]) classList.toArray();
}
I understand toArray() returns an Object[]. Is there a way to avoid the cast?
You can use the toArray method with the array as parameter:
return classList.toArray(new Class<?>[classList.size()]);
You can just create a new array and put each element in, one by one:
Class<?>[] classes = new Class<?>[classList.size()];
for (int i = 0 ; i < classList.size() ; i++) {
classes[i] = classList.get(i);
}
Or, rewrite the whole method without using the list:
private static Class<?>[] getClasses(final Object[] params) {
Class<?>[] classList = new Class<?>[params.length];
for (int i = 0 ; i < classList.length ; i++) {
classList[i] = params[i].getClass();
}
return classList;
}
