# Uses of Class
java.lang.ClassFormatError

Packages that use ClassFormatError
Package
Description
java.lang
Provides classes that are fundamental to the design of the Java programming language.
java.lang.reflect
Provides classes and interfaces for obtaining reflective information about classes and objects.

## Uses of ClassFormatError in java.lang

Subclasses of ClassFormatError in java.lang
Modifier and Type
Class
Description
`class`
`UnsupportedClassVersionError`
Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported.
Methods in java.lang that throw ClassFormatError
Modifier and Type
Method
Description
`protected final Class<?>`
ClassLoader.`defineClass(byte[] b, int off, int len)`
Deprecated.
Replaced by `defineClass(String, byte[], int, int)`
`protected final Class<?>`
ClassLoader.`defineClass(String name, byte[] b, int off, int len)`
Converts an array of bytes into an instance of class `Class`.
`protected final Class<?>`
ClassLoader.`defineClass(String name, byte[] b, int off, int len, ProtectionDomain protectionDomain)`
Converts an array of bytes into an instance of class `Class`, with a given `ProtectionDomain`.
`protected final Class<?>`
ClassLoader.`defineClass(String name, ByteBuffer b, ProtectionDomain protectionDomain)`
Converts a `ByteBuffer` into an instance of class `Class`, with the given `ProtectionDomain`.

## Uses of ClassFormatError in java.lang.reflect

Subclasses of ClassFormatError in java.lang.reflect
Modifier and Type
Class
Description
`class`
`GenericSignatureFormatError`
Thrown when a syntactically malformed signature attribute is encountered by a reflective method that needs to interpret the generic signature information for a class or interface, method or constructor.