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29 lines
386 B
29 lines
386 B
public class Jb25_ObjExtends
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{
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public static void main(String[] args)
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{
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Student a = new Student();
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a.name = "xiaoming";
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a.age = 17;
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a.study();
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}
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}
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/*
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继承的优点:
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提高代码复用性
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类与类之间产生了关系，给第三个特征多态提供了前提
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*/
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class Person
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{
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String name;
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int age;
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}
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class Student extends Person
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{
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void study()
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{
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System.out.println(age+"岁的"+name+"正在学习");
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}
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} |