W3cubDocs

Interface Signature

All Known Subinterfaces:: Signature.ArrayTypeSig, Signature.BaseTypeSig, Signature.ClassTypeSig, Signature.RefTypeSig, Signature.ThrowableSig, Signature.TypeVarSig

public sealed interface Signature permits Signature.BaseTypeSig, Signature.RefTypeSig, Signature.ThrowableSig

Models generic Java type signatures, as defined in JVMS 4.7.9.1.

See Java Language Specification:

4.1 The Kinds of Types and Values

See Java Virtual Machine Specification:

4.7.9.1 Signatures

Sealed Class Hierarchy Graph:

Since:

See Also:

Nested Class Summary

Modifier and Type	Interface	Description
`static interface`	`Signature.ArrayTypeSig`	Models the signature of an array type.
`static interface`	`Signature.BaseTypeSig`	Models the signature of a primitive type (JLS 4.2) or void.
`static interface`	`Signature.ClassTypeSig`	Models the signature of a possibly-parameterized class or interface type.
`static interface`	`Signature.RefTypeSig`	Models the signature of a reference type, which may be a class, interface, type variable, or array type.
`static interface`	`Signature.ThrowableSig`	Marker interface for a signature for a throwable type.
`static interface`	`Signature.TypeArg`	Models a type argument, an argument to a type parameter.
`static interface`	`Signature.TypeParam`	Models a signature for a type parameter of a generic class, interface, method, or constructor, which introduces a type variable.
`static interface`	`Signature.TypeVarSig`	Models the signature of a type variable.

Method Summary

Modifier and Type	Method	Description
`static Signature`	`of(ClassDesc classDesc)`	Returns a Java type signature from a field descriptor.
`static Signature`	`parseFrom(String javaTypeSignature)`	Parses a Java type signature from a raw string.
`String`	`signatureString()`	Returns the raw signature string.

Method Details

signatureString

String signatureString()

Returns the raw signature string.

Returns:: the raw signature string

parseFrom

static Signature parseFrom(String javaTypeSignature)

Parses a Java type signature from a raw string.

Parameters:: javaTypeSignature - raw Java type signature string
Returns:: a Java type signature
Throws:: IllegalArgumentException - if the string is not a valid Java type signature string

of

static Signature of(ClassDesc classDesc)

Returns a Java type signature from a field descriptor. The returned signature represents a reifiable type (JLS 4.7).

Parameters:: classDesc - the symbolic description of the Java type
Returns:: a Java type signature from a field descriptor

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/classfile/Signature.html