使用默认的负载因子(0.75)和足以将映射保存在指定Map中的初始容量创建HashMap。 publicHashMap(Map<?extendsK,?extendsV>m){this.loadFactor=DEFAULT_LOAD_FACTOR;putMapEntries(m,false);} 这里调用了putMapEntries()方法,我们待会再细说,现在先简单里理解为根据一个已经存在的Map集合去创建一个新Map集合,有点类...
*/publicstaticSimpleFeatureCollectiongetFeatureCollection(String filename, String encoding)throwsIOException, NoSuchAuthorityCodeException, FactoryException{// Open fileFile infile =newFile(filename);// Parameters of ShapefileDatastoreMap<String, Serializable> params =newHashMap<String, Serializ...
publicHashMap(intinitialCapacity,floatloadFactor){// 指定初始容量是否小于0if(initialCapacity<0)thrownewIllegalArgumentException("Illegal initial capacity: "+initialCapacity);// 若指定初始容量大于最大容量,则初始容量为最大容量if(initialCapacity>MAXIMUM_CAPACITY)initialCapacity=MAXIMUM_CAPACITY;// 初始容量是否为...
<select id="findByMap" parameterType="map" resultType="com.lili.entity.User"> select * from user where username = #{username} and address = #{address} </select> 1. 2. 3. 4. 5. 6. 3.在使用方法的时候,Map的key为sql中取得值即可,没有顺序要求 Map<String,Object> map = new HashMap<...
Map<String, Object> map = Maps.newHashMap();if(bean !=null) { BeanMap beanMap = BeanMap.create(bean);for(Object key : beanMap.keySet()) { map.put(key+"", beanMap.get(key)); } }returnmap; } 开发者ID:Exrick,项目名称:xpay,代码行数:17,代码来源:StringUtils.java ...
HTTP Java Python Go JavaScript dotnet HTTP 复制 PUT https://management.azure.com/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Search/searchServices/mysearchservice?api-version=2023-11-01 { "location": "westus", "tags": { "app-name": "My e-commerce app" }, "sku": { "...
Java Python Go JavaScript dotnet HTTP 複製 PUT https://management.azure.com/subscriptions/subid/resourceGroups/default-azurebatch-japaneast/providers/Microsoft.Batch/batchAccounts/sampleacct/pools/testpool?api-version=2024-07-01 { "properties": { "vmSize": "Standard_d4s_v3", "deploymentCo...
HashMap是非synchronized,而Hashtable是synchronized,这意味着Hashtable是线程安全的,多个线程可以共享一个Hashtable;而如果没有正确的同步的话,多个线程是不能共享HashMap的。Java 5提供了ConcurrentHashMap,它是HashTable的替代,比HashTable的扩展性更好。
Map<Pair<String,String>,Set<String>> result = new HashMap<>(); for( String phase : allPhases ) { for( Person person : persons ) { Pair pair = new Pair( phase, person.getName() ); Set set = result.get( pair ); if( set == null ) { set = new TreeSet<String>(); } set...
SimpleEntry; import java.util.LinkedHashMap; import java.util.Map; import java.util.stream.Collectors; import java.util.stream.Stream; public class MapOrdering { public static void main(String[] args) { Map<String, String> mapSortedByKey = Stream .of(new SimpleEntry<>("key3", "value1")...