package枚举;/*** 枚举与Iterator用法相同,但是Iterator简化书写*/importjava.util.Enumeration;importjava.util.Vector;publicclassEnum {publicstaticvoidmain(String[] args) { Vector<String> v1 =newVector<String>(); v1.add("a"); v1.add("bb"); v1.add("ccc"); v1.add("dddd"); Enumeration<...
Array.of(3, 11, 8) // [3,11,8] Array.of(3) // [3] Array.of(3).length // 1 1. 2. 3. 这个方法的主要目的,是弥补数组构造函数Array()的不足。因为参数个数的不同,会导致Array()的行为有差异。 Array() // [] Array(3) // [, , ,] Array(3, 11, 8) // [3, 11, 8] 1...
EnumsAn enum is a special "class" that represents a group of constants (unchangeable variables, like final variables).To create an enum, use the enum keyword (instead of class or interface), and separate the constants with a comma. Note that they should be in uppercase letters:...
elementData = c.toArray(); if ((size = elementData.length) != 0) { // c.toArray might (incorrectly) not return Object[] (see 6260652) if (elementData.getClass() != Object[].class) elementData = Arrays.copyOf(elementData, size, Object[].class); } else { this.elementData = EMPTY_...
packagesun.misc;importjava.util.Enumeration;importjava.util.NoSuchElementException;/** A useful utility class that will enumerate over an array of * enumerations.*/publicclassCompoundEnumeration<E>implementsEnumeration<E>{privateEnumeration<E>[] enums;privateintindex = 0;publicCompoundEnumeration(Enumera...
class ArrayDemo { public static void main(String[] args) { // declares an array of integers int[] anArray; // allocates memory for 10 integers anArray = new int[10]; // initialize first element anArray[0] = 100; // initialize second element ...
>s)// 创建一个包括参数中所有元素的EnumSet<EextendsEnum<E>>EnumSet<E>of(Ee)<EextendsEnum<E>>EnumSet<E>of(Ee1,Ee2)<EextendsEnum<E>>EnumSet<E>of(Ee1,Ee2,Ee3)<EextendsEnum<E>>EnumSet<E>of(Ee1,Ee2,Ee3,Ee4)<EextendsEnum<E>>EnumSet<E>of(Ee1,Ee2,Ee3,Ee4,Ee5)<EextendsE...
Size.valueOf("SMALL") //返回常量 SMALL values()方法 values()方法返回包含所有枚举常量的枚举类型数组。例如, Size[] enumArray = Size.value(); 为什么使用Java枚举? 在Java中,引入了enum来代替int常量的使用。 假设我们使用了int常量集合。 class Size { public final static int SMALL = 1; public fina...
XmlEnum XmlEnumValue XMLEvent XMLEventAllocator XMLEventConsumer XMLEventFactory XMLEventReader XMLEventWriter XMLFilter XMLFilterImpl XMLFormatter XMLGregorianCalendar XmlID XmlIDREF XmlInlineBinaryData XMLInputFactory XmlJavaTypeAdapter XmlJavaTypeAdapter.DEFAULT XmlJavaTypeAdapters Xml...
AJava Enumis a special Java type used to define collections of constants. More precisely, a Java enum type is a special kind of Java class. An enum can contain constants, methods etc. Java enums were added in Java 5. This Java enum tutorial explains how to create and use a Java enum...