## Class Interval2D

• Object
• edu.princeton.cs.algs4.Interval2D

• public class Interval2D
extends Object
The Interval2D class represents a closed two-dimensional interval, which represents all points (x, y) with both xmin <= x <= xmax and ymin <= y <= ymax. Two-dimensional intervals are immutable: their values cannot be changed after they are created. The class Interval2D includes methods for checking whether a two-dimensional interval contains a point and determining whether two two-dimensional intervals intersect.

For additional documentation, see Section 1.2 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.

Author:
Robert Sedgewick, Kevin Wayne
• ### Constructor Summary

Constructors
Constructor Description
Interval2D​(Interval1D x, Interval1D y)
Initializes a two-dimensional interval.
• ### Method Summary

All Methods
Modifier and Type Method Description
double area()
Returns the area of this two-dimensional interval.
boolean contains​(Point2D p)
Does this two-dimensional interval contain the point p?
void draw()
Draws this two-dimensional interval to standard draw.
boolean equals​(Object other)
Does this interval equal the other interval?
int hashCode()
Returns an integer hash code for this interval.
boolean intersects​(Interval2D that)
Does this two-dimensional interval intersect that two-dimensional interval?
static void main​(String[] args)
Unit tests the Interval2D data type.
String toString()
Returns a string representation of this two-dimensional interval.
• ### Constructor Detail

• #### Interval2D

public Interval2D​(Interval1D x,
Interval1D y)
Initializes a two-dimensional interval.
Parameters:
x - the one-dimensional interval of x-coordinates
y - the one-dimensional interval of y-coordinates
• ### Method Detail

• #### intersects

public boolean intersects​(Interval2D that)
Does this two-dimensional interval intersect that two-dimensional interval?
Parameters:
that - the other two-dimensional interval
Returns:
true if this two-dimensional interval intersects that two-dimensional interval; false otherwise
• #### contains

public boolean contains​(Point2D p)
Does this two-dimensional interval contain the point p?
Parameters:
p - the two-dimensional point
Returns:
true if this two-dimensional interval contains the point p; false otherwise
• #### area

public double area()
Returns the area of this two-dimensional interval.
Returns:
the area of this two-dimensional interval
• #### toString

public String toString()
Returns a string representation of this two-dimensional interval.
Overrides:
toString in class Object
Returns:
a string representation of this two-dimensional interval in the form [xmin, xmax] x [ymin, ymax]
• #### equals

public boolean equals​(Object other)
Does this interval equal the other interval?
Overrides:
equals in class Object
Parameters:
other - the other interval
Returns:
true if this interval equals the other interval; false otherwise
• #### hashCode

public int hashCode()
Returns an integer hash code for this interval.
Overrides:
hashCode in class Object
Returns:
an integer hash code for this interval
• #### draw

public void draw()
Draws this two-dimensional interval to standard draw.
• #### main

public static void main​(String[] args)
Unit tests the Interval2D data type.
Parameters:
args - the command-line arguments