Points with example 1

                 Points in java with example

Points

The most simple graphics primitive is point. It is a single dot on the window. There is no method to draw a point in Swing. To draw a point, we use the drawLine() method. We use one point twice.

package PRACTICEPROGRAM;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Insets;

import java.util.Random;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.SwingUtilities;

class DrawPanel extends JPanel {

    public void paintComponent(Graphics g) {

        super.paintComponent(g);

        Graphics2D g2d = (Graphics2D) g;

        g2d.setColor(Color.blue);

        for (int i = 0; i <= 1000; i++) {

            Dimension size = getSize();

            Insets insets = getInsets();

            int w = size.width - insets.left - insets.right;

            int h = size.height - insets.top - insets.bottom;

            Random r = new Random();

            int x = Math.abs(r.nextInt()) % w;

            int y = Math.abs(r.nextInt()) % h;

            g2d.drawLine(x, y, x, y);

        }

    }

}

public class PointsExample extends JFrame {

    public PointsExample() {

        initUI();

    }

    public final void initUI() {

        DrawPanel dpnl = new DrawPanel();

        add(dpnl);

        setSize(250, 200);

        setTitle("Points");

        setLocationRelativeTo(null);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                PointsExample ex = new PointsExample();

                ex.setVisible(true);

            }

        });

    }}

 

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