Home Java Example Java Swing Graphics2D Draw Grids

Draw Grids
Posted on: October 16, 2008 at 12:00 AM

To draw the grids, we have defined rows and columns. The method g.drawLine(0, k * heightOfRow, width, k * heightOfRow) draws the number of rows.

Draw Grids

This section illustrates you how to draw grids.

To draw the grids, we have defined rows and columns. The method g.drawLine(0, k * heightOfRow, width, k * heightOfRow) draws the number of rows. The method g.drawLine(k*widthOfRow, 0, k*widthOfRow, height) draws the number of columns.

Now create a canvas and add it to the frame by the following code:

Grids grid = new Grids(w, h, rows, cols);
add(grid);

Here is the code of DrawGrids.java


import java.awt.*;

import java.awt.event.*;



class Grids extends Canvas {

  int width, height, rows, columns;

 

  Grids(int w, int h, int r, int c) {

  setSize(width = w, height = h);

  rows = r;

  columns = c;

  }

  public void paint(Graphics g) {

  int k;

  width = getSize().width;

  height = getSize().height;



  int htOfRow = height / (rows);

  for (k = 0; k < rows; k++)

  g.drawLine(0, k * htOfRow , width, k * htOfRow );



  int wdOfRow = width / (columns);

  for (k = 0; k < columns; k++)

  g.drawLine(k*wdOfRow , 0, k*wdOfRow , height);

  }

}

public class DrawGrids extends Frame {

  DrawGrids(String title, int w, int h, int rows, int columns) {

  setTitle(title);

  Grids grid = new Grids(w, h, rows, columns);

  add(grid);

    }

public static void main(String[] args) {

  new DrawGrids("Draw Grids", 200, 200, 2, 10).setVisible(true);

  }

}

Output will be displayed as

Download Source Code

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