Lines in Java 2D

LineJava2D13.java

package hw;
import java.awt.*;
import javax.swing.*;
import java.util.Scanner;
public class LineJava2D13 extends JPanel  {
	public static int x1,x2,y1,y2;
		public void paintComponent(Graphics g) {
			g.drawLine(x1, y1, x2, y2);
		}
		public static void main(String[] args) {
			Scanner sc=new Scanner(System.in);
			System.out.println("Coordinates for Line (4): ");
			x1=sc.nextInt();
			y1=sc.nextInt();
			x2=sc.nextInt();
			y2=sc.nextInt();
			JFrame frame=new JFrame();
			frame.setSize(500, 500);
			frame.setVisible(true);
			frame.setTitle("Line Example in Java 2D.");
			frame.setContentPane(new LineJava2D13());
		}
	}