Record Class Point

java.lang.Object
java.lang.Record
it.unimi.di.prog2.s17.Point
Record Components:
x - the x coordinate.
y - the y coordinate.
z - the z coordinate.
public record Point(int x, int y, int z) extends Record
Immutable three-dimensional point with integer coordinates.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private final int
    x
    The field for the x record component.
    private final int
    y
    The field for the y record component.
    private final int
    z
    The field for the z record component.
    static final Point
    ZERO
    The point corresponding to the origin.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Point(int x, int y, int z)
    Creates an instance of a Point record class.

  • Method Summary

    Modifier and Type
    Method
    Description
    final boolean
    equals(Object o)
    Indicates whether some other object is "equal to" this one.
    final int
    hashCode()
    Returns a hash code value for this object.
    long
    norm()
    Returns the l1 norm of this point.
    Point
    signum()
    Returns a point with coordinates -1, 0, or 1 depending on the sign of the coordinates of this point.
    Point
    subtract(Point q)
    Returns the difference between this point and the given point.
    Point
    sum(Point q)
    Returns the sum of this point and the given point.
    String
    toString()
    Returns a string representation of this record class.
    int
    x()
    Returns the value of the x record component.
    int
    y()
    Returns the value of the y record component.
    int
    z()
    Returns the value of the z record component.

    Methods inherited from class Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Field Details

    • x

      private final int x
      The field for the x record component.

    • y

      private final int y
      The field for the y record component.

    • z

      private final int z
      The field for the z record component.

    • ZERO

      public static final Point ZERO
      The point corresponding to the origin.

  • Constructor Details

    • Point

      public Point(int x, int y, int z)
      Creates an instance of a Point record class.
      Parameters:
      x - the value for the x record component
      y - the value for the y record component
      z - the value for the z record component

  • Method Details

    • sum

      public Point sum(Point q)
      Returns the sum of this point and the given point.
      Parameters:
      q - the point to be added to this point.
      Returns:
      the sum.
      Throws:
      NullPointerException - if q is null.

    • subtract

      public Point subtract(Point q)
      Returns the difference between this point and the given point.
      Parameters:
      q - the point to be subtracted from this point.
      Returns:
      the difference.
      Throws:
      NullPointerException - if q is null.

    • norm

      public long norm()
      Returns the l1 norm of this point.
      Returns:
      the norm.

    • signum

      public Point signum()
      Returns a point with coordinates -1, 0, or 1 depending on the sign of the coordinates of this point.
      Returns:
      a point with coordinates representing the sign of this point's coordinates.

    • toString

      public String toString()
      Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.
      Specified by:
      toString in class Record
      Returns:
      a string representation of this object

    • hashCode

      public final int hashCode()
      Returns a hash code value for this object. The value is derived from the hash code of each of the record components.
      Specified by:
      hashCode in class Record
      Returns:
      a hash code value for this object

    • equals

      public final boolean equals(Object o)
      Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. All components in this record class are compared with the compare method from their corresponding wrapper classes.
      Specified by:
      equals in class Record
      Parameters:
      o - the object with which to compare
      Returns:
      true if this object is the same as the o argument; false otherwise.

    • x

      public int x()
      Returns the value of the x record component.
      Returns:
      the value of the x record component

    • y

      public int y()
      Returns the value of the y record component.
      Returns:
      the value of the y record component

    • z

      public int z()
      Returns the value of the z record component.
      Returns:
      the value of the z record component