1 package com.yhqtv.java;
2
3 /*
4 * @author XMKJ yhqtv.com Email:yhqtv@qq.com
5 * @create 2020-05-02-9:46
6 *方式一：jdk5.0之前，自定義枚舉類
7 * 方式二：jdk5.0 可以使用enum關鍵字定義枚舉類
8 *
9 *
10 */
11 public class SeasonTest {
12 public static void main(String[] args) {
13 Season summer = Season.SUMMER;
14 System.out.println(summer);
15 Season autumn = Season.AUTUMN;
16 System.out.println(autumn);
17 }
18
19 //自定義枚舉類
20 }
21 class Season{
22 //1.聲明Season對象的屬性：private final修飾
23 private final String seasonName;
24 private final String seasonDesc;
25 //2.私有化類的構造器，並給對象屬性賦值
26 private Season(String seasonName,String seasonDesc){
27 this.seasonDesc=seasonDesc;
28 this.seasonName=seasonName;
29
30 }
31 //3. 提供當前枚舉類的多個對象：public static final
32 public static final Season SPRING=new Season("春天","春暖花開");
33 public static final Season SUMMER=new Season("夏天","夏季炎炎");
34 public static final Season AUTUMN=new Season("秋天","秋高氣爽");
35 public static final Season WINTER=new Season("冬天","冬雪皚皚");
36 // 4.其他訴求1：獲取枚舉類對象的屬性
37 public String getSeasonName() {
38 return seasonName;
39 }
40
41 public String getSeasonDesc() {
42 return seasonDesc;
43 }
44
45 @Override
46 public String toString() {
47 return "Season{" +
48 "seasonName='" + seasonName + '\'' +
49 ", seasonDesc='" + seasonDesc + '\'' +
50 '}';
51 }
52
53 }
1 package com.yhqtv.java;
2
3 /*
4 *使用enum關鍵字定義枚舉類
5 * 說明：定義的枚舉類默認繼承於java.lang.Enum類
6 * @author XMKJ yhqtv.com Email:yhqtv@qq.com
7 * @create 2020-05-02-10:23
8 *
9 */
10 public class SeasonTest1 {
11 public static void main(String[] args) {
12 Season1 autumn = Season1.AUTUMN;
13 //toString();
14 System.out.println(autumn.toString());
15
16 // System.out.println(Season1.class.getSuperclass());
17 System.out.println("--------------------");
18 //values();
19 Season1[] values = Season1.values();
20 for (int i = 0; i < values.length; i++) {
21 System.out.println(values[i]);
22 values[i].show();
23 }
24 System.out.println("--------------------");
25 Thread.State[] values1 = Thread.State.values();
26 for (int i = 0; i < values1.length; i++) {
27 System.out.println(values1[i]);
28 }
29 System.out.println("--------------------");
30 //valueOf(String objName):返回枚舉類中對象名是objName的對象
31 Season1 winter = Season1.valueOf("WINTER");
32 System.out.println(winter);
33 winter.show();
34
35 }
36
37 }
38
39 interface Info {
40 void show();
41
42 }
43
44 enum Season1 implements Info {
45 //1.提供當前枚舉類的對象，多個對象之間用「,」隔開，末尾用「;」結束
46 SPRING("春天", "春暖花開") {
47 @Override
48 public void show() {
49 System.out.println("春天在哪裡");
50 }
51 },
52 SUMMER("夏天", "夏季炎炎") {
53 @Override
54 public void show() {
55 System.out.println("夏天好無聊");
56 }
57 },
58 AUTUMN("秋天", "秋高氣爽") {
59 @Override
60 public void show() {
61 System.out.println("秋天很涼爽");
62 }
63 },
64 WINTER("冬天", "冬雪皚皚") {
65 @Override
66 public void show() {
67 System.out.println("冬天很冷");
68 }
69 };
70 //2.聲明Season對象的屬性：private final修飾
71 private final String seasonName;
72 private final String seasonDesc;
73
74 //3.私有化類的構造器，並給對象屬性賦值
75 private Season1(String seasonName, String seasonDesc) {
76 this.seasonDesc = seasonDesc;
77 this.seasonName = seasonName;
78
79 }
80
81 // 4.其他訴求1：獲取枚舉類對象的屬性
82 public String getSeasonName() {
83 return seasonName;
84 }
85
86 public String getSeasonDesc() {
87 return seasonDesc;
88 }
89
90 // @Override
91 // public String toString() {
92 // return "Season{" +
93 // "seasonName='" + seasonName + '\'' +
94 // ", seasonDesc='" + seasonDesc + '\'' +
95 // '}';
96 // }
97
98 }
