定义一个Person类（name age sno）进行数据封装 age的年龄范围设置为0到130 使用getAge返回年龄。

public class Person {private String name;private int age;private String sno;public Person(String name, int age, String sno) {this.name = name;this.age = age;this.sno = sno;if (age <= 0 || age > 130) {System.out.println("非法年龄");return;}}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {if (age <= 0 || age > 130) {System.out.println("非法年龄");return;}this.age = age;}public String getSno() {return sno;}public void setSno(String sno) {this.sno = sno;}public static void main(String[] args) {Person p = new Person("camila", 20, "17111107");System.out.println(p.getName());System.out.println(p.age);System.out.println(p.sno);}}