Java基础之继承

package Basic;public class TextExtends {public static void main(String[] args){Man man = new Man(22,"Double");man.sound();man.hear();}}class Animals{int age;String name ;public Animals(int age ,String name){this.age = age ;this.name = name ;}public void sound(){System.out.println("Thie is sounding");}} class Man extends Animals{public Man(int age ,String name){super(age,name);System.out.println(name+"'s age is "+age);}public void hear(){System.out.println("Thie is hearing");}}

①没有声明public的类需要，定义对象；

②一个文件只能声明一个public类；

③类继承（extends）后，子类可以使用父类的参数和方法（若是private声明除外）。