// Java program to convert a HashSet // into an array import java.util.*; public class Main { public static void main(String[] args) { HashSet < Integer > nums = new HashSet(); nums.add(1); nums.add(2); nums.add(3); nums.add(4); nums.add(5); nums.add(6); Object ...
import java.util.List; import java.util.Map; import java.util.Set; public class helloWorld { public static void main(String[] args) { Map map = new HashMap(); Map mapcopy = new HashMap(); map.put(1,2);//插入映射 map.put(2, 4); map.put(9, 10); map.get(1);//根据key,获...
public void convertCollectionToCollectionNull() throws Exception { @SuppressWarnings("unchecked") List<Integer> bar = (List<Integer>) conversionService.convert(null, TypeDescriptor.valueOf(LinkedHashSet.class), new TypeDescriptor(getClass().getField("genericList"))); assertNull(bar); } 代码示例来源...
For example, let’s take a list that contains integers and strings and pass it intoset()function to convert the list into set. The resulting set contains only the unique elements of the list, in random order. the integer12only appears once in the set, even though it appears twice in th...
public void setAddress(String address) { this.address = address; } } // AddressAction 类型 package org.apache.struts2.showcase.conversion; import java.util.LinkedHashSet; import java.util.Set; import com.opensymphony.xwork2.ActionSupport; ...
setAddress(String address) { this.address = address; } } // AddressAction 类型 package org.apache.struts2.showcase.conversion; import java.util.LinkedHashSet; import java.util.Set; import com.opensymphony.xwork2.ActionSupport; public class AddressAction extends ActionSupport { private Set addresses...
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import scala.jdk.CollectionConverters._ object myObject { def main(args: Array[String]): Unit = { val javaSet = new java.util.HashSet[Int]() javaSet.add(4535) javaSet.add(2003) javaSet.add(111) val scalaString = javaSet.toString println("The string conversion of java set is " + ...
targetSetClass); } else { result = new LinkedHashSet<>(this.sourceSet.size()); } Class<?> valueType = null; if (this.targetSetClass != null) { valueType = ResolvableType.forClass(this.targetSetClass).asCollection().resolveGeneric(); } if (valueType != null) { TypeConverter ...
An example of this issue is the use of the Java LinkedHashSet class. According to the Java API documentation, the LinkedHashSet class ensures consistent ordering of entries in the HashSet (which is a type of dictionary), without the overhead imposed by other ordered dictionaries. While the ...