14

 1 abstract class A{
  2     private String name;
  3     public A(String name) {
  4         this.name = name;
  5     }
  6     public String getName() {
  7         return this.name;
  8     }
  9     public abstract void fun();
 10 }
 11 class B extends A{
 12     public B(String name) {
 13         super(name);
 14     }
 15     public void fun() {
 16         System.out.println(super.getName());
 17     }
 18 }
 19 public class L {
 20     public static void main(String[] args) {
 21         // TODO Auto-generated method stub
 22         B b = new B(null);
 23         b.fun();
 24     }
 25 }
 26 import java.sql.Date;
 27 
 28 @SuppressWarnings("unused")
 29 public abstract class Y {
 30     private String name;
 31     private String Class;
 32     private String date;
 33 
 34 public String getName() {
 35     return this.name;
 36 }
 37 public void setName(String name) {
 38     this.name = name;
 39 }
 40 public String GetClass() {
 41     return this.Class;
 42 }
 43 public void setClass(String Class) {
 44     this.Class = Class;
 45 }
 46 public String getDate() {
 47     return this.date;
 48 }
 49 public void setDate(String date) {
 50     this.date = date;
 51 }
 52 public Y(String name,String Class,String date) {
 53     this.name = name;
 54     this.Class = Class;
 55     this.date = date;
 56 }
 57 public Y() {
 58     super();
 59 }
 60 
 61 @Override
 62 public String toString() {
 63     return "Student [name=" + name + "]";
 64 }
 65 public abstract String speak();
 66 
 67 }
 68 import java.sql.Date;
 69 @SuppressWarnings("unused")
 70 public class H extends Y{
 71     private String matter;
 72     public H(String name,String Class,String date,String matter) {
 73         super(name,Class,date);
 74         this.setMatter(matter);
 75     }
 76     @Override
 77     public String speak() {
 78         return "我叫 " + super.getName() + " 今年 " + super.GetClass() + " 身高 " + super.getDate() + " 体重 " + this.matter;
 79     }
 80     public String getMatter() {
 81         return matter;
 82     }
 83     public void setMatter(String matter) {
 84         this.matter = matter;
 85     }
 86     
 87 }
 88 public class K {
 89 
 90     public static void main(String[] args) {
 91         // TODO Auto-generated method stub
 92         Y stu = new H("罗元昊，","19岁了，","173cm，","52KG。");
 93         print(stu.speak());
 94     }
 95 
 96     private static void print(String speak) {
 97         System.out.println(speak);
 98         
 99     }
100 
101 }