# Uses of Class
jdk.jfr.ContentType

Packages that use ContentType
Package | Description
--- | ---
jdk.jfr | This package provides classes to create events and control Flight Recorder.

## Uses of ContentType in jdk.jfr

Classes in jdk.jfr with annotations of type ContentType
Modifier and Type | Class | Description
--- | --- | ---
`interface` | `BooleanFlag` | Event field annotation, specifies that the value is a boolean flag, a `true` or `false` value
`interface` | `DataAmount` | Event field annotation, specifies that a value represents an amount of data (for example, bytes).
`interface` | `Frequency` | Event field annotation, specifies that the value is a frequency, measured in Hz.
`interface` | `MemoryAddress` | Event field annotation, specifies that the value is a memory address.
`interface` | `Percentage` | Event field annotation to use on fractions, typically between `0.0` and `1.0`, to specify that the value is a percentage.
`interface` | `Timespan` | Event field annotation, specifies that the value is a duration.
`interface` | `Timestamp` | Event field annotation, specifies that the value is a point in time.
`interface` | `Unsigned` | Event field annotation, specifies that the value is of an unsigned data type.