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What is a class in java

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2019-11-15 10:29:389768browse

java类就是具备某些共同特征的实体的集合,它是一种抽象的数据类型,它是对所具有相同特征实体的抽象。在面向对象的程序设计语言中,类是对一类“事物”的属性与行为的抽象。

What is a class in java

类:类是一个模板,它描述一类对象的行为和状态。

类的声明                  (推荐学习:java课程

class 类名{  
    类体的内容
}

class是关键字用原来定义类,类名必须是合法的java标识符

Java中的类

类可以看成是创建Java对象的模板。

通过下面一个简单的类来理解下Java中类的定义:

public class Dog{
  String breed;
  int age;
  String color;
  void barking(){
  }
 
  void hungry(){
  }
 
  void sleeping(){
  }
}

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