javaMap<String,Object> map =newHashMap<>(); // 添加一些键值对到map中 Iterator<Map.Entry<String,Object>> iterator = map.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<String,Object> entry = iterator.next(); System.out.println("Key: " + entry.getKey() +", Value: "...
Map<String, Object> map =newHashMap(); Map<String, Object> map2 =newHashMap(); map.put("key", "1"); map.put("value", "a"); map2.put("key", "2"); map2.put("value", "a"); list1.add(map2); list1.add(map); list1.forEach(System.out::println);//将Map里面的每一...
for (Map<String, Object> map : Result) { System.out.println("count:"+map.get("count")+" name:"+map.get("name")); } } static class MapComparatorDesc implements Comparator<Map<String, Object>> { @Override public int compare(Map<String, Object> m1, Map<String, Object> m2) { Intege...
Map map = new HashMap(); //Object is containing String Map newMap =new HashMap(); for (Map.Entry entry : map.entrySet()) { if(entry.getValue() instanceof String){ newMap.put(entry.getKey(), (String) entry.getValue()); } } 如果不是每个Objects不是String,则可以将(String) entry...
在Java中返回Map<String, Object>可以通过以下方式实现: 创建一个Map对象,并指定键的类型为String,值的类型为Object: 代码语言:txt 复制 Map<String, Object> map = new HashMap<>(); 向Map中添加键值对: 代码语言:txt 复制 map.put("key1", value1); map.put("key2", value2); ...
Map<String,Object> map=new HashMap<String, Object>(); Field[] fields = obj.getClass().getDeclaredFields(); for(Field field:fields){ field.setAccessible(true); map.put(field.getName(), field.get(obj)); } return map; } public Object map2Obj(Map<String,Object> map,Class<?> clz) ...
Map<String, Object> map = new HashMap<>(); Field[] fields = object.getClass().getDeclaredFields(); for (Field field: fields) { field.setAccessible(true); map.put(field.getName(), field.get(object)); } return map; } 在上面的测试中,我们使用了一个名为convertUsingReflection的私有方法来...
Map<String, String> map = (Map<String, String>) o1;但是，如果Object o1的类型不是Map<String, String>，那么直接进行类型转换会抛出ClassCastException异常。因此，在进行转换前，最好进行类型检查：if (o1 instanceof Map) { if (o1 instanceof Map<String, String>) { Map<String, String>...
public class Test {private static final Map<Class<?>, Object> primitiveDefaults = new HashMap<Class<?>, Object>();public static void main(String[] args) {primitiveDefaults.put("num".getClass(),"123");System.out.println(primitiveDefaults.get("num".getClass()));//输出123 }}...
Map<String,Object> map = iterator.next(); Iterator<Map.Entry<String,Object>> entryIterator = map.entrySet().iterator(); while (entryIterator.hasNext()) { Map.Entry<String,Object> entry = entryIterator.next(); System.out.println("Key: " + entry.getKey() +", Value: " + entry.getVal...