Answer to Question #12791 in Java | JSP | JSF for David

Question

Complete a program by writing a method called drawGrid that draws a table / grid on the
window from (0,0) to (x,y) where x and y are integers passed to the method drawGrid as
parameters. A method call to drawGrid is given inside mousePressed so you can test your
program by pressing the mouse at different location in the display window. A sample output
is given along side.

A table consists of -
1. a red bordered rectangle with opposite
corners at (0,0) and (x,y)
2. black vertical and horizontal lines from (0,0)
to (x,0) and (0,0) to (0,y) respectively, with a
gap of GAP between them. GAP is a final int
defined at the top of the program.

Answer 1

public static void drawGrid(int x, int y, Graphics
g){
g.setColor(Color.RED);
g.drawRect(0,0,x,y);
g.setColor(Color.BLACK);
int
x1=0;
int maxY=y/GAP;
int maxX=x/GAP;
for (int i=0; i<maxX;
i++){
x1=GAP*i;
g.drawLine(x1, 0, x1, y);
}
int y1=0;
for (int
i=0; i<maxY; i++){
y1=GAP*i;
g.drawLine(0, y1, x, y1);
}
}