参数类型

package lianxii;

public class ReferenceType {

    private int day   = 12;
    private int month = 6;
    private int year  = 1900;

    public ReferenceType(int d, int m, int y) {

        year = y;
        month = m;
        day = d;
    }

    public void display() {

        System.out.println(year + "/" + month + "/" + day);
    }

    public static void main(String[] args) {

        ReferenceType m;
        m = new ReferenceType(22, 9, 2014);
        m.display();

    }
}