CODEWITHSUNDEEP
java
zher4883
zher4883

Reputation: 35

Using loop to draw line

I'm supposed to draw this in Java

enter image description here

This is what I have so far:

DrawPanel.java

package drawpaneltest;

import java.awt.Graphics;
import javax.swing.JPanel;

public class DrawPanel extends JPanel {

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int width = getWidth();
        int height = getHeight();
        int d = 0;
        while (d < 301) {
            g.drawLine(0, d, width, height);
            d += 15;
        }
    }
}

DrawPanelTest.java

package drawpaneltest;

import javax.swing.JFrame;

public class DrawPanelTest {

    public static void main(String[] args) {
        DrawPanel panel = new DrawPanel();
        JFrame application = new JFrame();
        application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        application.add(panel); // add the panel to the frame 
        application.setSize(250, 250); // set the size of the frame
        application.setVisible(true); // make the frame visible 
    }
}

The above code sample currently displays the following:

Code sample window

What did I missed out? How should I add the curved line and the vertical line?

Upvotes: 3

Views: 5825

Answers (2)

Shofwan
Shofwan

Reputation: 451

Here's my approach:

package drawpaneltest;


import java.awt.Graphics;
 import javax.swing.JPanel;
 public class DrawPanel extends JPanel {
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int width = getWidth();
        int height = getHeight();
        int x1 = 0, y1 = 0,
            x2 = 0, y2 = height;
        while (y1 < height) {
            g.drawLine(x1, y1, x2, y2);
            y1+=15;                 //You should modify this if
            x2+=15;                 //it's not an equal square (like 250x250)
        }
    }
 }

And then it will do this: image

However in JPanel, coordinate (0,0) begin on the left top corner, not on left bottom corner as usual. And it still can not do well on a (m x n) squares, you have to do a lot more than this.

Upvotes: 1

Beno&#238;t
Beno&#238;t

Reputation: 1100

You should also change the to coordinates (d replacing width):

g.drawLine(0, d, d, height);

Upvotes: 0

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