i am trying to have an array of classes with 10 memebers
package localpackage;
import localpackage.Class;
public class School {
int code;
String name;
Class[] classes = new Class[10];
public School(int _code, String _name, Class _classes[]){
code = _code;
name = _name;
classes = _classes;
}
}
It seems you want to ensure a minimum size of a variable in the constructor. Take a look here, you will find what you need:
set minimum size of a variable array in the constructor
To name some of the solutions here, you can either directly check it with something like:
if (name.length() < 12){
throw new IllegalArgumentException("name must have at least 12 characters");
}
Or you can move the check to a seperate Method and call it from the constructor.
Finally, you can use annotations like:
class Kingdom {
@MinLength(12)
private String name;
...
}
But then you need to create the Annotation class and implement the behaviour yourself.
You can either use ArrayList and define your 10 items :
List<Integer> arr = new ArrayList<>();
arr.add(1);
arr.add(2);
arr.add(3);
arr.add(4);
arr.add(5);
arr.add(6);
arr.add(7);
arr.add(8);
arr.add(9);
arr.add(10);
Or from array :
ArrayList<String> gfg = new ArrayList<String>(
Arrays.asList(1,2,3,4,5,6,7,8,9,10));
Or use a nCopy :
List<Integer> list = new ArrayList<Integer>(Collections.nCopies(10, new ItemsToCreate());
Or you can use a for loop
