使用反射设置数组的值

import java.lang.reflect.Array;
import static java.lang.System.err;

public class ArrayTroubleAgain {
    public static void main(String... args) {
        Integer[] ary = new Integer[2];
        try {
            Array.setInt(ary, 0, 1); // IllegalArgumentException

            // production code should handle these exceptions more gracefully
        } catch (IllegalArgumentException x) {
            err.format("Unable to box%n");
        } catch (ArrayIndexOutOfBoundsException x) {
            x.printStackTrace();
        }
    }
}