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Added in API level 33

Summary: Ctors | Methods | Inherited Methods

XECPublicKeySpec

public class XECPublicKeySpec
extends Object implements KeySpec

java.lang.Object
↳	java.security.spec.XECPublicKeySpec

A class representing elliptic curve public keys as defined in RFC 7748, including the curve and other algorithm parameters. The public key is a particular point on the curve, which is represented using only its u-coordinate. A u-coordinate is an element of the field of integers modulo some value that is determined by the algorithm parameters. This field element is represented by a BigInteger which may hold any value. That is, the BigInteger is not restricted to the range of canonical field elements.

Summary

Public constructors
`XECPublicKeySpec(AlgorithmParameterSpec params, BigInteger u)` Construct a public key spec using the supplied parameters and u coordinate.

Public methods
`AlgorithmParameterSpec`	`getParams()` Get the algorithm parameters that define the curve and other settings.
`BigInteger`	`getU()` Get the u coordinate of the point.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

XECPublicKeySpec

Added in API level 33

public XECPublicKeySpec (AlgorithmParameterSpec params, 
                BigInteger u)

Construct a public key spec using the supplied parameters and u coordinate.

Parameters
`params`	`AlgorithmParameterSpec`: the algorithm parameters
`u`	`BigInteger`: the u-coordinate of the point, represented using a BigInteger which may hold any value

Throws
`NullPointerException`	if `params` or `u` is null.

Public methods

getParams

Added in API level 33

public AlgorithmParameterSpec getParams ()

Get the algorithm parameters that define the curve and other settings.

Returns
`AlgorithmParameterSpec`	the parameters

getU

Added in API level 33

public BigInteger getU ()

Get the u coordinate of the point.

Returns
`BigInteger`	the u-coordinate, represented using a BigInteger which may hold any value

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.

Last updated 2026-08-03 UTC.

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