Usage Enums provide a way to define a collection of constants in a type-safe manner. They can include methods and fields, and they can implement interfaces. Syntax EnumName: The name of the enum. CONSTANT1, CONSTANT2, CONSTANT3: The constants defined within the enum. ...
Code 2:EnumConstructor.java 下面是枚举类型中的构造方法使用 public class EnumConstructor { //constructor usage enum SexEnum{ male("I am a man"), famle("I am a woman"), shemale("I am a shemale"); private String description; private SexEnum(String str){ this.description=str; } public St...
getResourceAsStream(resourcePath)) { //noinspection UnstableApiUsage return ByteStreams.toByteArray(Objects.requireNonNull(in)); } catch (IOException e) { throw new RuntimeException(e); } } @SuppressWarnings({"unchecked", "rawtypes"}) @Test public void testClassLoad() throws Exception { Clas...
}publicstaticvoidmain(String[] args) {if(args.length !=1) { System.err.println("Usage: java Planet <earth_weight>"); System.exit(-1); }doubleearthWeight=Double.parseDouble(args[0]);doublemass=earthWeight/Planet.EARTH.getSurfaceGravity();for(Planet p:Planet.values()){ System.out.printf...
toStringin classObject Returns: the name of this enum constant hashCode public final int hashCode() Returns a hash code for this enum constant. Overrides: hashCodein classObject Returns: a hash code for this enum constant. See Also: Object.equals(java.lang.Object),System.identityHashCode(java....
System.err.println("usage: java TEDemo amountInPennies");return; }intpennies = Integer.parseInt(args[0]);for(inti =0; i < Coin.values().length; i++) System.out.println(pennies +" pennies contains "+ Coin.values()[i].toCoins(pennies) +" "+ ...
This is just a basic way to use enums with values in Java, but there’s much more to learn about using enums effectively. Continue reading for more detailed information and advanced usage scenarios. Table of Contents[hide] Defining and Using Enums with Values in Java ...
Here is a simple Java enum example: public enum Level { HIGH, MEDIUM, LOW } Notice theenumkeyword which is used in place ofclassorinterface. The Javaenumkeyword signals to the Java compiler that this type definition is an enum. You can refer to the constants in the enum above like this...
public static UsageUnit fromString(String value) Parses a serialized value to a UsageUnit instance. Parameters value java.lang.String the serialized value to parse. Returns UsageUnit the parsed UsageUnit object, or null if unable to parse. ...
static UsageLimitSummary.ValueTypevalueOf(String name) Returns the enum constant of this type with the specified name. static UsageLimitSummary.ValueType[]values() Returns an array containing the constants of this enum type, in the order they are declared. Methods inherited from class ...