GitHub

java.lang.ClassCastException: class java.lang.Boolean cannot be cast to class java.lang.Number

We are leveraging flink-connector-clickhouse to read and write data to clickhouse from custom written DataStream Api KeyedCoProcessFunction. Implementation uses AbstractClickHouseOutputFormat builder ...
GitHub

java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.Boolean

java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.Boolean (java.lang.Integer and java.lang.Boolean are in module java.base of ...
InfoWorld

Class and object initialization in Java

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...
InfoWorld

Static classes and inner classes in Java

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also known as ...