How do I get the component type of an array in Java?

The Class.getComponentType() method call returns the Class representing the component type of an array. If this class does not represent an array class this method returns null reference instead.

public class ComponentTypeDemo {
    public static void main(String[] args) {
        String[] words = {"and", "the"};
        int[][] matrix = {{1, 1}, {2, 1}};
        Double number = 10.0;

        Class clazz = words.getClass();
        Class cls = matrix.getClass();
        Class clz = number.getClass();

        //
        // Gets the type of an array component.
        //
        Class type = clazz.getComponentType();
        System.out.println("Words type: " +
                type.getCanonicalName());

        //
        // Gets the type of an array component.
        //
        Class matrixType = cls.getComponentType();
        System.out.println("Matrix type: " +
                matrixType.getCanonicalName());

        //
        // It will return null if the class doesn't represent
        // an array.
        //
        Class numberType = clz.getComponentType();
        if (numberType != null) {
            System.out.println("Number type: " +
                    numberType.getCanonicalName());
        } else {
            System.out.println(number.getClass().getName() +
                    " class is not an array");
        }
    }
}