public class Main {    public static void main(String[] args) {        Person ming = new Person();        ming.setName("小明");        ming.setAge(12);        System.out.println(ming.getAge());    }}class Person {    private String name;    private int age;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }}