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Message:

Well that part's done.

Posted by Steve on May 25, 2000 at 1:55 AM

> Hey guys/gals. I use the code segment below to draw the
> horizontal lines in a grid. Can I make an array of Line2D.Float,
> or should I use collections ?? I was thinking:
> float[20] xOne; //used to hold x1 coords. in Line2D.Float
> float[20] yOne; //y1 coords.
> float[20] xTwo; //x2 coords.
> float[20] yTwo; //y2 coords.
> Then an array used to hold an Hln[20] object. One Hln
> element could hold one element from each of the arrays above.
> If possible, how do I go about this.
> Once this is done, I was thinking to use a for LOOP to
> draw the lines. Thanks, Steve

> ----------------
> Line2D.Float Hln1 = new Line2D.Float(11F, 20F, 350F, 20F);
> Line2D.Float Hln2 = new Line2D.Float(11F, 30F, 350F, 30F);
> Line2D.Float Hln3 = new Line2D.Float(11F, 40F, 350F, 40F);
> Line2D.Float Hln4 = new Line2D.Float(11F, 50F, 350F, 50F);
> Line2D.Float Hln5 = new Line2D.Float(11F, 60F, 350F, 60F);
> Line2D.Float Hln6 = new Line2D.Float(11F, 70F, 350F, 70F);
> Line2D.Float Hln7 = new Line2D.Float(11F, 80F, 350F, 80F);
> Line2D.Float Hln8 = new Line2D.Float(11F, 90F, 350F, 90F);
> Line2D.Float Hln9 = new Line2D.Float(11F, 100F, 350F, 100F);
> Line2D.Float Hln10 = new Line2D.Float(11F, 110F, 350F, 110F);
> Line2D.Float Hln11 = new Line2D.Float(11F, 120F, 350F, 120F);
> Line2D.Float Hln12 = new Line2D.Float(11F, 130F, 350F, 130F);
> Line2D.Float Hln13 = new Line2D.Float(11F, 140F, 350F, 140F);
> Line2D.Float Hln14 = new Line2D.Float(11F, 150F, 350F, 150F);
> Line2D.Float Hln15 = new Line2D.Float(11F, 160F, 350F, 160F);
> Line2D.Float Hln16 = new Line2D.Float(11F, 170F, 350F, 170F);
> Line2D.Float Hln17 = new Line2D.Float(11F, 180F, 350F, 180F);
> Line2D.Float Hln18 = new Line2D.Float(11F, 190F, 350F, 190F);
> Line2D.Float Hln19 = new Line2D.Float(11F, 200F, 350F, 200F);
> Line2D.Float Hln20 = new Line2D.Float(11F, 210F, 350F, 210F);

> screen2D.draw(Hln1);
> screen2D.draw(Hln2);
> screen2D.draw(Hln3);
> screen2D.draw(Hln4);
> screen2D.draw(Hln5);
> screen2D.draw(Hln6);
> screen2D.draw(Hln7);
> screen2D.draw(Hln8);
> screen2D.draw(Hln9);
> screen2D.draw(Hln10);
> screen2D.draw(Hln11);
> screen2D.draw(Hln12);
> screen2D.draw(Hln13);
> screen2D.draw(Hln14);
> screen2D.draw(Hln15);
> screen2D.draw(Hln16);
> screen2D.draw(Hln17);
> screen2D.draw(Hln18);
> screen2D.draw(Hln19);
> screen2D.draw(Hln20);

I got it (Thanks, euyeuy). Here's the code if anyone's curious:

import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;

public class Chart extends JApplet {
float height;
float width;

public void init() {
setBackground(Color.white);
}

public void paint(Graphics screen) {
Graphics2D screen2D = (Graphics2D) screen;
height = (float) getSize().height;
width = (float) getSize().width;
screen2D.setColor(Color.black);
Rectangle2D.Float border = new Rectangle2D.Float(10F, 10F, 340F, 210F);
screen2D.draw(border);

// create and initialize 2D array of coords
// coords1=x1, y1 coords2=x2, y2 - Vertical
// coords3=x1, y1 coords4=x2, y2 - Horizontal
float [] [] coords1 = { {20F, 10F}, {30F, 10F}, {40F, 10F}, {50F, 10F}, {60F, 10F},
{70F, 10F}, {80F, 10F}, {90F, 10F}, {100F, 10F}, {110F, 10F},
{120F, 10F}, {130F, 10F}, {140F, 10F}, {150F, 10F},
{160F, 10F}, {170F, 10F}, {180F, 10F}, {190F, 10F},
{200F, 10F}, {210F, 10F}, {220F, 10F}, {230F, 10F}, {240F, 10F}, {250F, 10F}, {260F, 10F}, {270F, 10F}, {280F, 10F}, {290F, 10F}, {300F, 10F}, {310F, 10F}, {320F, 10F}, {330F, 10F}, {340F, 10F}
};
float [] [] coords2 = { {20F, 220F}, {30F, 220F}, {40F, 220F}, {50F, 220F}, {60F, 220F}, {70F, 220F}, {80F, 220F}, {90F, 220F}, {100F, 220F}, {110F, 220F}, {120F, 220F}, {130F, 220F}, {140F, 220F}, {150F, 220F}, {160F, 220F}, {170F, 220F}, {180F, 220F},
{190F, 220F}, {200F, 220F}, {210F, 220F}, {220F, 220F}, {230F, 220F}, {240F, 220F}, {250F, 220F}, {260F, 220F}, {270F, 220F}, {280F, 220F}, {290F, 220F}, {300F, 220F}, {310F, 220F}, {320F, 220F}, {330F, 220F}, {340F, 220F} };
float [] [] coords3 = { {10F, 20F}, {10F, 30F}, {10F, 40F}, {10F, 50F}, {10F, 60F},
{10F, 70F}, {10F, 80F}, {10F, 90F}, {10F, 100F}, {10F, 110F},
{10F, 120F}, {10F, 130F}, {10F, 140F}, {10F, 150F}, {10F, 160F}

};
float [] [] coords4 = { {350F, 20F}, {350F, 30F}, {350F, 40F}, {350F, 50F}, {350F, 60F}, {350F, 70F}, {350F, 80F}, {350F, 90F}, {350F, 100F}, {350F, 110},
{350F, 120F}, {350F, 130F}, {350F, 140F}, {350F, 150F},
{350F, 160F}
};

// create Point objects array from the coord array
Point2D.Float[] points1 = new Point2D.Float[coords1.length];
Point2D.Float[] points2 = new Point2D.Float[coords2.length];
Point2D.Float[] points3 = new Point2D.Float[coords3.length];
Point2D.Float[] points4 = new Point2D.Float[coords4.length];

// create Line objects array from the Point objects array
Line2D.Float[] VertLine2D = new Line2D.Float[points1.length];
Line2D.Float[] HorizLine2D = new Line2D.Float[points3.length];

// for LOOP for initializing the points/lines
for(int i = 0; i < points1.length; i++) {
points1[i] = new Point2D.Float(coords1[i] [0], coords1[i] [1]);
points2[i] = new Point2D.Float(coords2[i] [0], coords2[i] [1]);
VertLine2D[i] = new Line2D.Float(points1[i], points2[i]);
for(int z = 0; z < points3.length; z++) {
points3[z] = new Point2D.Float(coords3[z] [0], coords3[z] [1]);
points4[z] = new Point2D.Float(coords4[z] [0], coords4[z] [1]);
HorizLine2D[z] = new Line2D.Float(points3[z], points4[z]);

// drawing the lines
screen2D.setColor(Color.gray);
screen2D.draw(VertLine2D[i]);
screen2D.draw(HorizLine2D[z]);
}
}
}
}