Java compact1, compact2, compact3 java.security.spec Class ECFieldFp（JDK8）

Constructor Detail

• ECFieldFp

  public ECFieldFp(BigInteger p)

  Creates an elliptic curve prime finite field with the specified prime p.

  Parameters:

  p - the prime.

  Throws:

  NullPointerException - if p is null.

  IllegalArgumentException - if p is not positive.

Method Detail

• getFieldSize

  public int getFieldSize()

  Returns the field size in bits which is size of prime p for this prime finite field.

  Specified by:

  getFieldSize in interface ECField

  Returns:

  the field size in bits.

• getP

  public BigInteger getP()

  Returns the prime p of this prime finite field.

  Returns:

  the prime.

• equals

  public boolean equals(Object obj)

  Compares this prime finite field for equality with the specified object.

  Overrides:

  equals in class Object

  Parameters:

  obj - the object to be compared.

  Returns:

  true if obj is an instance of ECFieldFp and the prime value match, false otherwise.

  See Also:

  Object.hashCode(), HashMap

• hashCode

  public int hashCode()

  Returns a hash code value for this prime finite field.

  Overrides:

  hashCode in class Object

  Returns:

  a hash code value.

  See Also:

  Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)