How To Change Applet Color
I need some help with this program I have to create for Uni. The problem is that the setColor and getColor methods do no work, and the line doesn't change color when I want it too.
What do I need to do to change the color of the line to red?
Cheers
import java.awt.Color;
import java.awt.Point;
import javax.swing.JPanel;
import java.awt.*;
public class Shape extends JPanel {
static Point startPoint = new Point(0, 0);
Point controlPoint = new Point(0, 0);
Color colour = Color.BLACK;
public Shape() {
this(startPoint);
}
public Shape(Point startPoint) {
// initialise variable startPoint
this.startPoint = startPoint;
// execute methods setColour and setControlPoint
setColor(colour);
setControlPoint(controlPoint);
// change startPoint
startPoint.x = 50;
startPoint.y = 50;
}
public void setColor(Color colour) {
this.colour = colour;
colour = Color.RED;
}
public Color getColor() {
return colour;
}
public void setCont开发者_开发问答rolPoint(Point controlPoint) {
controlPoint.x = 150;
controlPoint.y = 150;
}
public void paintComponent(Graphics g) {
super.paintComponents(g);
g.setColor(colour);
g.drawLine(startPoint.x, startPoint.y, controlPoint.x, controlPoint.y);
}
}
You need to call repaint() after the color is set
public void setColor(Color colour) {
this.colour = colour;
colour = Color.RED;
// Repaint so the component uses the new color
repaint();
}
Or, you can get rid of the setColor() method.
Then you can use:
setForeground( colour );
to control the color of the line to be drawn.
The color of the Graphics object will be set to the foreground colour so you can also get rid of:
g.setColor( colour );
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