public class MyClass {

    public MyClass(){
        System.out.printf("调用无参数的构造方法");
    }
    public  MyClass(String name) {
        this();
        System.out.printf("调用一个参数的构造方法");
    }
    public  MyClass(String name , int a) {
        this(name);
        System.out.printf("调用两个参数的构造方法");
    }
    public static void main(String[] args){
        MyClass myClass = new MyClass("zz" , 20);
    }

    public static String initCap(String s){
        return s.substring(0, 1).toUpperCase().concat(s.substring(1));
    }
}