qingmuchuan_er的博客

java使用lamda表达式，出现类型无法自动识别到报一下异常 在这Exception in thread "main" org.apache.flink.api.common.functions.InvalidTypesException: The return type of function 'main(XXX.java:28)' could not be determined automatically, due to type erasure. You can give type informat

@org.apache.flink.api.common.InvalidProgramException: This type (GenericType<com.flink.learning.plan.TestObject) cannot be used as key.TOC 对于java 的对象要求；属性必须是public 的修饰符,必须添加无参数构造方法 报错之前类对象 public class WorldValueDesc { private String word; //