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Java basics

fillRect()


Fills the specified rectangle. The left and right edges of the rectangle are at x and x + width - 1. The top and bottom edges are at y and y + height - 1. The resulting rectangle covers an area width pixels wide by height pixels tall. The rectangle is filled using the graphics context's current color. Parameters: x - the x coordinate of the rectangle to be filled. y - the y coordinate of the rectangle to be filled. width - the width of the rectangle to be filled. height - the height of the rectangle to be filled.

Syntax:
public abstract void fillRect(int x,
            int y,
            int width,
            int height)


Example:

import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass extends JPanel {

  public void paint(Graphics g) {
    g.fillRect(0,0,200,200);
  
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new MainClass());

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(200,200);
    frame.setVisible(true);
  }
}


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