继承与抽象类解决工人与学生的问题
抽象类实例
package com.swift;
public abstract 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;
}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public Person() {
super();
}
@Override
public String toString() {
return "Person [name=" + name + ", age=" + age + "]";
}
public abstract String speak();
}
package com.swift;
public class Student extends Person{
private float score;
public Student(String name, int age, float score) {
super(name, age);
this.setScore(score);
}
@Override
public String speak() {
return "学生说-->我的姓名："+super.getName()+" "+super.getAge()+"岁 "+this.score+"分";
}
public float getScore() {
return score;
}
public void setScore(float score) {
this.score = score;
}
}
package com.swift;
public class Worker extends Person {
private float salary;
public Worker(String name, int age, float salary) {
super(name, age);
this.setSalary(salary);
}
@Override
public String speak() {
return "工人说 -->我的姓名："+super.getName()+" "+super.getAge()+"岁 "+this.salary+"元";
}
public float getSalary() {
return salary;
}
public void setSalary(float salary) {
this.salary = salary;
}
}
package com.swift;
public class DemoStudentWorker {
public static void main(String[] args) {
Person student=new Student("旺财",3, 90.5f);
Person worker=new Worker("小强",1, 8125.5f);
print(student.speak());
print(worker.speak());
}
private static void print(String speak) {
System.out.println(speak);
}
}抽象类的作用——为多态创造了可能
抽象类的作用总结