compare(SexEnum.valueOf("shemale")); //ordinal() to get the index of member variable for(SexEnum sex: SexEnum.values()){ out.println("Index of "+sex+" "+sex.ordinal()); } } } Code 2:EnumConstructor.java 下面是枚举类型中的构造方法使用 public class EnumConstructor { //constructor u...
We’ll use theSATstring for theenumname comparison and theSATURDAYvariable for theenum‘s property comparison. To make it complete, let’s create another twoStrings for negative tests: final String TYPO_FRI = "ffri"; final String TYPO_FRIDAY = "ffriday"; After we understand how to compare...
public class Pizza { private PizzaStatus status; public enum PizzaStatus { ORDERED, READY, DELIVERED; } public boolean isDeliverable() { if (getStatus() == PizzaStatus.READY) { return true; } return false; } // Methods that set and get the status variable. } 3|0枚举类型中定义属性,...
This is done in a static method, which iterates through the values within the enum and adds them to the map. There is also a private constructor where we assign the passed value to a variable. This is done automatically upon using an enum due to the parenthesis after each enum name. ...
(inttimeToDelivery) {this.timeToDelivery = timeToDelivery; } }publicbooleanisDeliverable(){returnthis.status.isReady(); }publicvoidprintTimeToDeliver(){ System.out.println("Time to delivery is "+this.getStatus().getTimeToDelivery()); }// Methods that set and get the status variable.} ...
#Enums are helpful if there are a definite number of fixed values for any one variable.For example, the crypto standard library for Node.js has a list of supported algorithms, that can be considered an enum group.In general, you will be better off using enums when:When...
We shoulduse an enum when we know all possible values of a variable at compile time or design time, though we can add more values in the future as and when we identify them. In this java enum tutorial, we will learn what enums are and what problems they solve. ...
Enums in switch Statements If your Java enum types contain a lot constants and you need to check a variable against the values as shown in the previous section, using a Javaswitchstatement might be a good idea. You can use enums in switch statements like this: ...
To use this class, you would introduce aSuitvariable and assign it to one ofSuit’s constants: Suitsuit=Suit.DIAMONDS; You might then want to interrogatesuitin aswitchstatement like this one: switch(suit) {caseSuit.CLUBS : System.out.println("clubs");break;caseSuit.DIAMONDS: System.out.pri...
问我的泛型EnumSet方法-无法访问Enum.values()EN您不能直接对泛型类型执行操作，因为在运行时，类型擦除...