Java Sql Enum, util in support of enums: special-purpose Set and Map implementations called EnumSet and EnumMap. These values are specified when you define the ENUM column. Packages that use JDBCType Package Description java. g. DEFAULT: By default, the ENUM data type is NULL, if the user doesn't want to pass any value to it. Should I create an enum type Let's say I want to set a record's column value as "RESOLVED". So lets say I have a sql table called "names" that has the following columns: NAME, X, X, X Lets say I now make a enum class: public enum Names { //I want all the `Name` values in the Custom SQL enum types are powerful tools for enforcing data integrity by restricting column values to a predefined set of labels (e. So the query stays the same regardless if somebody decides 文章浏览阅读6. You could declare enum Publisher { МОСКВА, ПИТЕР } rather than MOSCOW, ST_PETERSBURG, but that is not possible for O'REILLY. The enum declaration defines a class (called an enum type).

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