Draw line with Gradient

Question

Hi,
I am trying to implement drawing on canvas with two colors, red and blue.
For example, to draw with the mouse "with two colors".
I do not need a filled rectangle.
I am looking into gradient but without any success.
Is there a better way to draw a line with two colors?
I also tried to use BasicStroke, but the line had an inner/outer strokes.
Please help with suggestions.

Answer 1

devboris wrote:
..For example, to draw with the mouse "with two colors".
import java.awt.*;
import javax.swing.*;
class GradientLine {
    public static void main(String[] args) {
        GradientPanel gp = new GradientPanel();
        gp.setPreferredSize( new Dimension(600,400) );
        JOptionPane.showMessageDialog(null, gp);
class GradientPanel extends JPanel {
    public void paintComponent(Graphics g) {
        // cast the Graphics objkect to a Graphics2D object
        // (G2D includes setPaint() method)
        Graphics2D g2 = (Graphics2D)g;
        GradientPaint bgPaint = new GradientPaint(
            0,
            0,
            Color.black,
            getWidth(),
            getHeight(),
            Color.white );
        g2.setPaint(bgPaint);
        g2.fillRect( 0, 0, getWidth(), getHeight() );
        GradientPaint fgPaint = new GradientPaint(
            0,
            0,
            Color.yellow,
            getWidth(),
            getHeight(),
            Color.red );
        // set the paint to a gradient.
        g2.setPaint(fgPaint);
        for (int ii=0; ii<getWidth()/10; ii++) {
            g2.drawLine( ii*10, 0, ii*10, getHeight() );
        for (int ii=0; ii<getHeight()/10; ii++) {
            g2.drawLine( 0, ii*15, getWidth(), ii*15 );
}