What is Java paintComponent?

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paintComponent() This method is needed to draw something on JPanel other than drawing the background color. This method already exists in a JPanel class so that we need to use the super declaration to add something to this method and takes Graphics objects as parameters.

What is super paintComponent?

The invocation of super. paintComponent(g) passes the graphics context off to the component’s UI delegate, which paints the panel’s background.

How does paint work in Java?

Java 2D Web site….paint() does the following:

if the component’s doubleBuffered property is true and double-buffering is enabled on the component’s RepaintManager , will convert the Graphics object to an appropriate offscreen graphics.
invokes paintComponent() (passing in offscreen graphics if doubled-buffered)

How do I run a Java Graphics program?

Example of Graphics in applet:

import java. applet. Applet;
import java. awt. *;
public class GraphicsDemo extends Applet{
public void paint(Graphics g){
g. setColor(Color. red);
g. drawString(“Welcome”,50, 50);
g. drawLine(20,30,20,300);
g. drawRect(70,100,30,30);

What is the difference between paint and repaint in Java?

The paint() method contains instructions for painting the specific component. The repaint() method, which can’t be overridden, is more specific: it controls the update() to paint() process. You should call this method if you want a component to repaint itself or to change its look (but not the size).

How do you make a drawing in Java?

Basically, all you have to do in order to draw shapes in a Java application is:

Create a new Frame .
Create a class that extends the Component class and override the paint method.
Use Graphics2D.
Use Graphics2D.
Use Graphics2D.
Use Graphics2D.

What colors can I use in Java?

3.1 java. Color provides 13 standard colors as named-constants. They are: Color. RED , GREEN , BLUE , MAGENTA , CYAN , YELLOW , BLACK , WHITE , GRAY , DARK_GRAY , LIGHT_GRAY , ORANGE , and PINK .