1importjava.util.Collection;2importjava.util.HashSet;3importjava.util.Iterator;4publicclassTextIterator {5publicstaticvoidmain(String[] args){6Collection books=newHashSet();//无序序列,元素不可重复7books.add("世界你好");8books.add("你好世界");9books.add("你好Java");10System.out.println("...
System.out.print(iterator.next() +""); } } } Compile ok, but run-time error occurs: Exceptioninthread"main"java.lang.ClassCastException: collection.Dog cannot be cast to java.lang.Comparable at java.util.TreeMap.put(Unknown Source) at java.util.TreeSet.add(Unknown Source) at collection....
然后看源码和引入包的时候注意,这个集合类都是在util中的,不是在awt中的。 这个collection派中取出要取出全部集合元素有一个方法,那就是iterator迭代器。就是都有iterator()方法。有点像链表的指针,它只有三个方法,next(),hasnext(),remove().具体咋实现的都是看继承它的哪个类自己根据自己的数据结构来实现。主...
5.2. Convert LinkedHashSet to Array Example Java example to convert a LinkedHashSet to array usingtoArrray()method. LinkedHashSet<String> LinkedHashSet = new LinkedHashSet<>(); LinkedHashSet.add("A"); LinkedHashSet.add("B"); LinkedHashSet.add("C"); LinkedHashSet.add("D"); Linked...
Java.Util Assembly: Mono.Android.dll Hash table and linked list implementation of theSetinterface, with predictable iteration order. C#复制 [Android.Runtime.Register("java/util/LinkedHashSet", DoNotGenerateAcw=true)] [Java.Interop.JavaTypeParameters(new System.String[] {"E"})]publicclassLinkedHa...
A set backed by a red-black tree to keep the elements ordered with respect to the comparator. Implements Set, IteratorWithIndex, EnumerableWithIndex, JSONSerializer and JSONDeserializer interfaces. package main import "github.com/emirpasic/gods/sets/treeset" func main() { set := treeset.NewWi...
A set backed by a red-black tree to keep the elements ordered with respect to the comparator. Implements Set, IteratorWithIndex, EnumerableWithIndex, JSONSerializer and JSONDeserializer interfaces. package main import "github.com/emirpasic/gods/sets/treeset" func main() { set := treeset.NewWi...
importjava.util.LinkedHashSet; // Main class // LinkedHashSetExample publicclassGFG{ // Main driver method publicstaticvoidmain(String[]args) { // Creating an empty LinkedHashSet of string type LinkedHashSet<String>linkedset =newLinkedHashSet<String>(); ...
import java.util.LinkedHashSet; import java.util.Set; /** * LinkedHashSet与HashSet的区别就是数据严格按照插入的顺序存放。 * 删除之后会去掉那个位置,新增的数据将在集合的末尾。 * HashSet 内部使用HashMap实现 * 而LinkedHashSet内部使用LinkedHashMap实现。 */ public class LinkedHashSet类 { public ...
Learn about LinkedHashMap and LinkedHashSet in Java, their features, differences, and how to use them effectively in your Java applications.