$/**$

This class represents pairs of integers.

$*/$

public class Pair

$\{$

private int x;

private int y;

public Pair$()//$ default constructor

$\{$

this.x $=0$;

this.y $=0$;

$\}$

$/**$

Create a Pair object with the given values.

@param x x$-$value for the new Pair object

@param y y$-$value for the new Pair object

$*/$

public Pair$($int x$,$ int y$)$

$\{$

x $=$ this.x;

y $=$ this.y;

$\}$

$/**$

Create a Pair object with the given value

as both its x and y values.

@param v value for both numbers in the new Pair object

$*/$

public Pair$($int v$)$

$\{$

v $=$ this.x;

$\}$

$/**$

Create a Pair object with the same values

as the given Pair object.

@param p Pair object whose values should be copied

$*/$

public Pair$($Pair p$)$

$\{$

p $=$ this. x;

$\}$

$/**$

Get the x$-$value of this Pair object.

@return this Pair's x$-$value

$*/$

public int getX$()$

$\{$

return getX;

$\}$

$/**$

Change this Pair object to have the given x$-$value.

@param x new x$-$value for this Pair object

$*/$

public void setX$($int x$)$

$\{$

this.setX $=$ x;

$\}$

$/**$

Change this Pair object to have the same x$-$value

as the given Pair.

@param p Pair object whose x$-$value should be copied

$*/$

public void setX$($Pair p$)$

$\{$

$//$ implementation

$\}$

$/**$

Get the y$-$value of this Pair object.

@return this Pair's y$-$value

$*/$

public int getY$()$

$\{$

$//$ implementation

$\}$

$/**$

Change this Pair object to have the given y$-$value.

@param y new y$-$value for this Pair object

$*/$

public void setY$($int y$)$

$\{$

$//$ implementation

$\}$

$/**$

Change this Pair object to have the same y$-$value

as the given Pair.

@param p Pair object whose y$-$value should be copied

$*/$

public void setY$($Pair p$)$

$\{$

$//$ implementation

$\}$

$/**$

Change this Pair object to have the same x$-$value

and y$-$value as the given Pair.

@param p Pair object whose x$-$value and y$-$value should be copied

$*/$

public void set$($Pair p$)$

$\{$

$//$ implementation

$\}$

$/**$

Create a new Pair object that contains the swapped x$-$value

and y$-$value from this Pair object.

@return a new Pair that has the swapped values from this Pair

$*/$

public Pair swap$()$

$\{$

$//$ implementation

$\}$

$/**$

Determine if this Pair object has the same x$-$value

and the same y$-$value as the given Pair.

@param p a reference to a second Pair object

@return true if the given Pair is equal to this Pair

$*/$

public boolean equals$($Pair p$)$

$\{$

$//$ implementation

$\}$

$/**$

Determine if the two numbers in this Pair object are the

same two numbers that are in the given Pair without

regard for the order of the numbers. So $(2,3)$ and $(3,2)$

would have "equal numbers".

@param p a reference to a second Pair object

@return true if this Pair and the other Pair contain the same two numbers

$*/$

public boolean equalNumbers$($Pair p$)$

$\{$

$//$ implementation

$\}$

public String toString$()$

$\{$

return "Pair: $("+$ x $+","+$ y $+")"$;

$\}$

$\}$