Hello! My friend recommended that I try this site if I needed advice on my programs, so I thought 'hey, why not?'. I'm working on a program that is to draw shapes and store them in arrays. I kinda can't figure out how to make my print functions work correctly. I also don't know what I'm doing wrong when trying to add in the information. Any advice on what to do next would be absolutely wonderful!
package arraydrawer;
* Description:
* This program takes input and puts it into an the shape array specified.
* The two shapes available are Triangle and Square. The area is calculated and
* the user recieves a print out of the designated tasks the program does with
* the array information.
*/
public class ArrayDrawer
{
//Global Data
protected double coordx;
protected double coordy;
/**
* Create arrays with object score to store the squares in
* First array will store the side information
* Second array with store the area
* Third array will store the coordinates
*/
protected Square[] squares = new Square[10];
/**
* Create arrays with object score to store the triangles in
* First array will hold the base information
* Second array will store the area information
* Third array will store the height information
* Fourth array will store the coordinates
*/
protected Triangle[] triangles = new Triangle[10];
protected double[] x;
protected double[] y;
/*
* Description: This method will allow the squares to be entered into the array
* and will place them in the first empty location
* Precondition: The square array must already exist and have been set to null.
* Postcondition: The square will reside in the square array.
*/
public void addSquare(Square s)
{
/**
* Use findFirstEmptySquare to locate the first null spot in the square array
*/
int i = findFirstEmptySquare();
/**
* Take the empty spot and place the square in it
*/
if (i >= 0)
{
squares[i] = s;
}
else
{
//indicates that the array is full
System.out.println("The array is at maximum capacity");
}
}
/**
* Description: This method will search for the first empty spot in the square array
* Precondition: The square array must already exist
* Postcondition: There will now be one less empty spot since a square will
* be residing in the formerly empty location.
*/
public int findFirstEmptySquare()
{
/**
* Function of this method is to scan the array for the first null
* position
*/
for (int i = 0; i <= squares.length; i++)
{
/**
* Scan the array by using int i to correspond to the position of the
* empty spot in the square array.
*/
if (squares[i] == null)
{
//Indicates that the scan located a null spot in the array
return i;
}
}
//Indicates that the scan produced no null spots in array
return -1;
}
/**
* Description: This method is when a square is removed from the square array
* Precondition: The square array must already exist and there must be at least
* square in the array.
* Postcondition: There will be one more empty spot since the square that was
* residing in that was removed.
*/
public void deleteSquare(int p)
{
for (int i = 0; i <= squares.length; i++)
//Take the filled seat and remove the child
if (p == i)
{
//Removes a specific triangle from the bus array
squares[i] = null;
}
}
/*
* Description: This method will allow the triangles to be entered into the triangle array
* and will place them in the first empty location
* Precondition: The triangle array must already exist and have been set to null.
* Postcondition: The triangle will reside in the array.
*/
public void addTriangle(Triangle b)
{
/**
* Use findFirstEmptySquare to locate the first null spot in the triangle array
*/
int t = findFirstEmptyTriangle();
/**
* Take the empty spot and place the square in it
*/
if (t >= 0)
{
triangles[t] = b;
}
else
{
//indicates that the array is full
System.out.println("The array is at maximum capacity");
}
}
/**
* Description: This method will search for the first empty spot in the triangle array.
* Precondition: The array must already exist.
* Postcondition: There will now be one less empty spot since a triangle will
* be residing in the formerly empty location.
*/
public int findFirstEmptyTriangle()
{
/**
* Function of this method is to scan the array for the first null
* position
*/
for (int i = 0; i <= triangles.length; i++)
{
/**
* Scan the array by using int i to correspond to the position of the
* empty spot in the array.
*/
if (triangles[i] == null)
{
//Indicates that the scan located a null spot in the array
return i;
}
}
//Indicates that the scan produced no null spots in array
return -1;
}
/**
* Description: This method is when a triangle is removed from the triangle array
* Precondition: The triangle array must already exist and there must be at least
* triangle in the array.
* Postcondition: There will be one more empty spot since the triangle that was
* residing in that was removed.
*/
public void deleteTriangle(int p)
{
for (int j = 0; j <= triangles.length; j++)
//Take the filled seat and remove the child
if (p == j)
{
//Removes a specific triangle from the bus array
triangles[j] = null;
}
}
/**
* Description: This method will print all of the occupied positions in the arrays.
* It will first print squares, then triangles.
* Precondition: The arrays must already exist and there must be at least
* item in the arrays
* Postcondition: There will be a printout of all of the occupied slots in the arrays
* and what is occupying them
*/
public void print()
{
/**
* Print out the Square array
*/
for(Square sq: squares)
{
if (sq != null)
{
sq.squarePrint();
}
}
/**
* Print out the Triangle array
*/
for (Triangle tr: triangles)
{
if (tr != null)
{
tr.trianglePrint();
}
}
}
public static void main(String[] args)
{
ArrayDrawer ar1 = new ArrayDrawer();
double base, height, coordx, coordy, side;
Square s;
Triangle b;
Square sq = new Square();
Triangle tr = new Triangle();
/**
* Create a triangle with the following information:
* Base = 1
* Height = 2
* Coords(3,4)
*/
base = 1;
height = 2;
coordx = 3;
coordy = 4;
tr.setBase(base);
tr.setHeight(height);
tr.setCoord(coordx, coordy);
tr.trianglePrint();
/**
* Create a triangle with the following information:
* Base = 5
* Height = 6
* Coords(7,8)
*/
base = 5;
height = 6;
coordx = 3;
coordy = 4;
/**
* Create a square with the following information:
* Size = 9
* Coords(10,11)
*/
// addSquare rInfo1 = new addSquare(0, {10, 11});
//s = 0;
side = 0;
coordx = 10;
coordy = 11;
/**
* Print all geometric objects with the following parameters:
* Square array prints first
* Triangle array prints second
* prints: "After creating a square with size = 9, coords = (10,11), this
* is what is in the array", same for triangle
*/
System.out.println("After creating a square with size = 9 and coordinates "
+ "(10,11), this is what resides in the two arrays: ");
ar1.print();
/**
* Create a triangle with the following information:
* Base = 12
* Height = 13
* Coords(14,15)
*/
base = 12;
height = 13;
coordx = 14;
coordy = 15;
/**
* Delete the triangle in position 1
*/
ar1.deleteTriangle(0);
/**
* Print all geometric objects with the following parameters:
* Square array prints first
* Triangle array prints second
* prints: "After deleting the triangle in position 1 of the triangle array,
* this is what remains:"
*/
System.out.println("After deleting the triangle in position 1 of the triangle array," +
" this is what remains:");
ar1.print();
/**
* Create a triangle with the following information:
* Base = 16
* Height = 17
* Coords(18,19)
*/
base = 16;
height = 17;
coordx = 18;
coordy = 19;
/**
* Print all geometric objects with the following parameters:
* Square array prints first
* Triangle array prints second
* prints: "After creating a triangle with base = 16, height = 17 and
* coordinates (18,19), this is what resides in the arrays: "
*/
System.out.println("After creating a triangle with base = 16, height = 17 and "
+" coordinates (18,19), this is what resides in the arrays: ");
ar1.print();
/**
* Create a triangle with the following information:
* Base = 20
* Height = 21
* Coords(22,23)
*/
//b = 20;
base = 20;
height = 21;
coordx = 22;
coordy = 23;
/**
* Create a square with the following information:
* Size = 24
* Coords(25,26)
*/
//s = 24;
side = 24;
coordx = 25;
coordy = 26;
/**
* Print all geometric objects with the following parameters:
* Square array prints first
* Triangle array prints second
* prints: "After creating a square with size = 24 and coordinates (25,26),
* this is what remains in the array: "
*/
System.out.println("After creating a square with size = 24 and coordinates (25,26),"
+ " this is what remains in the array: ");
ar1.print();
/**
* Change the coordinates of all objects to (-1,-1)
*/
coordx = -1;
coordy = -1;
/**
* Print all geometric objects with the following parameters:
* Square array prints first
* Triangle array prints second
* prints: "After changing the coordinates of all objects to (-1, -1),
* this is what remains in the array: "
*/
System.out.println("After changing the coordinates of all objects to (-1, -1), "
+ "this is what remains in the array: ");
ar1.print();
}
}/*
* Description:
* This holds all the information/functions that the square class is capable
* of enacting
*/
package arraydrawer;
public class Square extends ArrayDrawer
{
//Data fields
// protected double side = 0;
// protected double area = 0;
// protected double coordx = 0;
// protected double coordy = 0;
protected double[] sqSide = new double[10];
protected double[] sqArea = new double[10];
protected double[] sqCoordx = new double[10];
protected double[] sqCoordy = new double[10];
public double setSide(double s)
{
int c = findFirstEmptySquare();
if (c >= 0)
{
sqSide[c] = s;
}
return s;
}
/**
* Description: This method computes the area of the Square.
* Precondition: The sides must have already been entered into the array.
* Postcondition: There will be a resulting area.
*/
public double computeArea(double side)
{
int z = findFirstEmptySquare();
if (z >= 0)
{
sqArea[z] = side * side;
}
return side;
}
/*
* Description: This method sets the coordinates for the object.
* Precondition: The array must exist and coordinates must have already
* been entered in.
* Postcondition: The item in the array will have set coordinates.
*/
public void setCoord(double x, double y)
{
int e = findFirstEmptySquare();
if (e >= 0)
{
sqCoordx[e] = x;
sqCoordy[e] = y;
}
}
/**
* Description: Prints out the information located in the square array
* Precondition: There is something residing in the square array
* Postcondition: N/A
*/
public void squarePrint()
{
for (int r = 0; r < 10; r++)
{
if (squares[r] != null)
{
System.out.print("Location in array is: " + r);
System.out.println("Side: " + squares[r] + " Area: " + sqArea[r] + " Coordinates: "
+ sqCoordx[r] + " , " + sqCoordy[r]);
}
}
}
public void setSquare(double s)
{
int a = findFirstEmptySquare();
if (a >= 0)
{
ArrayDrawer.addSquare(sqSide[a]);
ArrayDrawer.addSquare(sqArea[a]);
ArrayDrawer.addSquare(sqCoordx[a]);
ArrayDrawer.addSquare(sqCoordy[a]);
}
}
}Oh, the parts that are giving me trouble are the parts under the Square class, under SetSquare(and how to get that information there :/). As well as the print function there.
Thank you for any advice you can give!!! =)