你好,我有一个复杂的结构。
Map<Map<String,String>, Map<String,String>> a
我希望能够遍历所有元素。我尝试了以下代码:
for(Map.Entry<Map<String,String>, Map<String,String>> first:firstMap.keySet()) {
...
}
错误信息为:
Cannot cast object '{key1=value1, key2=value2, key3=value3, key4=value4}' with class 'java.util.LinkedHashMap' to class 'java.util.Map$Entry' due to: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.util.Map$Entry(java.util.LinkedHashMap)
如何遍历我的地图?