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网站定制深圳,18款免费软件app下载,夫唯seo怎么样,专业做政法ppt的网站项目代码 https://github.com/yinhai1114/Java_Learning_Code/tree/main/IDEA_Chapter11/src/com/yinhai/enum_ 〇、创建时自动填入版权作者等信息如何在每个文件创建的时候打入自己的信息以及版权呢菜单栏-File-setting-Editor-File and Code Templaters -Includes-输入信…

项目代码

https://github.com/yinhai1114/Java_Learning_Code/tree/main/IDEA_Chapter11/src/com/yinhai/enum_

〇、创建时自动填入版权作者等信息

如何在每个文件创建的时候打入自己的信息以及版权呢

菜单栏-File-setting-Editor-File and Code Templaters -Includes-输入信息如下图

一、引出

要求创建季节（Season）对象，请设计并完成

/*** @author 银海* @version 1.0*/
public class Enumeration01 {public static void main(String[] args) {Season season = new Season("spring", "worm");Season season1 = new Season("winter", "cold");Season season2 = new Season("summer", "hot");Season season3 = new Season("autumn", "cold");//对于季节而言，是固定的四个 不会有更多//因此这样设计不好，所以引出枚举类，把对象一个个列举出来Season other = new Season("asdasdas", "~~~~~~~~~");}
}
class Season{private String name;private String desc;public Season(String name, String desc) {this.name = name;this.desc = desc;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getDesc() {return desc;}public void setDesc(String desc) {this.desc = desc;}
}

二、两种实现方式

1.自定义类实现枚举

1)不需要提供setXxx方法，因为枚举对象值通常为只读.

2)对枚举对象/属性使用final + static 共同修饰，实现底层优化.

3)枚举对象名通常使用全部大写，常量的命名规范

4)枚举对象根据需要，也可以有多个属性

public class Enumeration02 {public static void main(String[] args) {System.out.println(Season.AUTUMN);System.out.println(Season.SPRING);System.out.println(Season.SUMMER);System.out.println(Season.WINTER);}
}class Season {private String name;private String desc;//3.在Season内部直接创建对象，加上public static//4.优化可以加入final修饰符public final static Season SPRING = new Season("春天", "暖");public final static Season WINTER = new Season("冬天", "寒冷");public final static Season AUTUMN = new Season("秋天", "冷");public final static Season SUMMER = new Season("夏天", "热");//1.私有化构造器public Season(String name, String desc) {this.name = name;this.desc = desc;}//2.去掉set方法 防止被修改public String getName() {return name;}public String getDesc() {return desc;}}

小结：进行自定义类实现枚举有如下特点

1)构造器私有化

2)本类内部创建一组对象

3)对外暴露对象(通过为对象添加public final static修饰符)

4)可以提供get方法，但是不要提供set

2.enum关键字实现枚举（引出）

public class Enumeration03 {public static void main(String[] args) {System.out.println(Season.AUTUMN);System.out.println(Season.SPRING);System.out.println(Season.SUMMER);System.out.println(Season.WINTER);}}
enum Season {//1.使用enum代替class//2.//常量名(实参列表);//3.如果有多个常量(对象)SPRING("春天", "暖"),WINTER("冬天", "寒冷"),AUTUMN("秋天", "冷"),SUMMER("夏天", "热");//等价于自定义的public final static Season SPRING = new Season("春天", "暖");//4.如果使用enum来实现枚举，要求将常量对象写在前面private String name;private String desc;private Season(String name, String desc) {this.name = name;this.desc = desc;}public String getName() {return name;}public String getDesc() {return desc;}}