下面是一个简单的状态图,展示了Map取keys的过程: stateDiagram Map ->> keySet(): 获取所有键 keySet() -->> Set: 返回键的集合 通过调用keySet()方法,我们可以很方便地获取到Map中的所有键,从而进行相应的操作。 总结 在Java中,Map是一种常用的数据结构,用于存储键值对。当我们需要获取Map中的所有键时,可...
map.put(null,3);for(String key : getKeys(map,3)) { System.out.println(key); } }privatestaticSet<String>getKeys(Map<String, Integer> map, Integer value){ Set<String> result =newHashSet<>();if(map.containsValue(value)) {for(Map.Entry<String, Integer> entry : map.entrySet()) {if...
Integer>map=newHashMap<>();// 添加键值对map.put("Apple",30);map.put("Banana",20);map.put("Orange",25);// 获取所有的键System.out.println("Keys: "+map.keySet());// 获取所有的值System.out.println("Values: "+map.values());// 获取所有...
map.put("password","pass1");// Get keys and valuesfor(Map.Entry<String, String> entry : map.entrySet()) {Stringk=entry.getKey();Stringv=entry.getValue(); System.out.println("Key: "+ k +", Value: "+ v); }// Get all keysSet<String> keys = map.keySet();for(String k : ...
The simplest way to get the keys from aHashMapin Java is to invoke thekeySet()method on yourHashMapobject. It returns asetcontaining all the keys from theHashMap. In the example below, we will first create aHashMapobject, insert some values in it, and then usekeySet()to get the keys...
EnumMap EnumSet EventListenerProxy EventObject FormatFlags FormatFlagsConversionMismatchException FormattableFlags 格式化程序 Formatter.BigDecimalLayoutForm FormatterClosedException 格雷戈里安·卡伦达尔 HashMap HashSet Hashtable HexFormat ICollection IComparator ...
Set<String>keys= jedis.keys(root + Constants.ANY_VALUE);if(keys!=null&&keys.size() >0) {for(String key :keys) { Map<String, String> values = jedis.hgetAll(key);if(values !=null&& values.size() >0) {booleandelete =false;longnow = System.currentTimeMillis();for(Map.Entry<String,...
Returns a view of the portion of this map whose keys are less than (or equal to, if inclusive is true) toKey.HeadMap(Object) To be added [Android.Runtime.Register("headMap", "(Ljava/lang/Object;)Ljava/util/SortedMap;", "GetHeadMap_Ljava_lang_Object_Handler:Java.Util.INavigableMap...
- Iterate through the List and pull out the corresponding values from the Map Is that any good? James Sabre Ranch Hand Posts: 781 I like... posted 14 years ago Matthew Brown wrote:The easiest approach I can think of off the top of my head is: - Keep all your keys in a separa...
示例3: getOSKey ▲点赞 3▼ importjavax.swing.InputMap;//导入方法依赖的package包/类privateJavaAgentKeysgetOSKey(){ KeyStroke selectall =null; InputMap inputMap =newJTextField().getInputMap(); KeyStroke[]allKeys= inputMap.allKeys();for(KeyStroke keyStroke :allKeys) { ...