Brecenhan's Line Drawing Algorithm using Java

BrecenhansLineDrawingAlgorithm.java

import java.util.List;
import java.util.ArrayList;
import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.Color;
import java.util.Arrays;

// driving code
class BrecenhansLineDrawingAlgorithm{
	public static void main(String[] args) {
        Table table = new Table(2, 2, 80, 60);
        table.drawTable();
        new DrawPixel(table.getList());
    }
}

// create table class
class Table {
    private int x1, x2, y1, y2;
    private List<List<Integer>> list = new ArrayList<List<Integer>>();
    Table(int x1, int y1, int x2, int y2){
        this.x1 = x1;
        this.x2 = x2;
        this.y1 = y1;
        this.y2 = y2;
    }
    public void drawTable(){
        System.out.println("X old\tY old\tX inc\tY inc\tX new\tY new\tround(X new)\tround(Y new)");
        System.out.println("-----------------------------------------------------------------------------");
        
        int dx = Math.abs(x2 - x1);
	int dy = Math.abs(y2 - y1);
	float x=x1, y=y1;
        float p = (2*dy) - dx;

        list.add(Arrays.asList(Math.round(x),Math.round(y)));
        for(int i=0; i<dx; i++){
            System.out.print(String.format("%.2f", x)+"\t"+String.format("%.2f", y)+"\t"+1+"\t"+1+"\t");
            x += 1;
            if(p >= 0){
                y += 1;
                p += (2*dy) - (2*dx);
            }
            else{
                p += 2*dy;
            }
            list.add(Arrays.asList(Math.round(x),Math.round(y)));
            System.out.println(String.format("%.2f", x)+"\t"+String.format("%.2f", y)+"\t"+Math.round(x)+"\t\t"+Math.round(y));
        }
    }
    public List<List<Integer>> getList(){
        return this.list;
    }
}

// draw pixel class
class DrawPixel extends JFrame{
    private List<List<Integer>> list = new ArrayList<List<Integer>>();
    public DrawPixel(List<List<Integer>> list){
        super("Brecenhan's Algo");
        setSize(200, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        this.list = list;
    }
    @Override
    public void paint(Graphics g){
        g.setColor(new Color(255, 0, 0));
        for(List<Integer> a: list){
            g.drawRect(0+a.get(0), 200-a.get(1), 1, 1);
        }
    }
}

Output

X old	Y old	X inc	Y inc	X new	Y new	round(X new)	round(Y new)
2.00	2.00	1	1	3.00	3.00	3	3
3.00	3.00	1	1	4.00	3.00	4	3
4.00	3.00	1	1	5.00	4.00	5	4
5.00	4.00	1	1	6.00	5.00	6	5
6.00	5.00	1	1	7.00	6.00	7	6
7.00	6.00	1	1	8.00	6.00	8	6
8.00	6.00	1	1	9.00	7.00	9	7
9.00	7.00	1	1	10.00	8.00	10	8
10.00	8.00	1	1	11.00	9.00	11	9
11.00	9.00	1	1	12.00	9.00	12	9
12.00	9.00	1	1	13.00	10.00	13	10
13.00	10.00	1	1	14.00	11.00	14	11
14.00	11.00	1	1	15.00	12.00	15	12
15.00	12.00	1	1	16.00	12.00	16	12
16.00	12.00	1	1	17.00	13.00	17	13
17.00	13.00	1	1	18.00	14.00	18	14
18.00	14.00	1	1	19.00	15.00	19	15
19.00	15.00	1	1	20.00	15.00	20	15
20.00	15.00	1	1	21.00	16.00	21	16
21.00	16.00	1	1	22.00	17.00	22	17
22.00	17.00	1	1	23.00	18.00	23	18
23.00	18.00	1	1	24.00	18.00	24	18
24.00	18.00	1	1	25.00	19.00	25	19
25.00	19.00	1	1	26.00	20.00	26	20
26.00	20.00	1	1	27.00	21.00	27	21
27.00	21.00	1	1	28.00	21.00	28	21
28.00	21.00	1	1	29.00	22.00	29	22
29.00	22.00	1	1	30.00	23.00	30	23
30.00	23.00	1	1	31.00	24.00	31	24
31.00	24.00	1	1	32.00	24.00	32	24
32.00	24.00	1	1	33.00	25.00	33	25
33.00	25.00	1	1	34.00	26.00	34	26
34.00	26.00	1	1	35.00	27.00	35	27
35.00	27.00	1	1	36.00	27.00	36	27
36.00	27.00	1	1	37.00	28.00	37	28
37.00	28.00	1	1	38.00	29.00	38	29
38.00	29.00	1	1	39.00	30.00	39	30
39.00	30.00	1	1	40.00	30.00	40	30
40.00	30.00	1	1	41.00	31.00	41	31
41.00	31.00	1	1	42.00	32.00	42	32
42.00	32.00	1	1	43.00	32.00	43	32
43.00	32.00	1	1	44.00	33.00	44	33
44.00	33.00	1	1	45.00	34.00	45	34
45.00	34.00	1	1	46.00	35.00	46	35
46.00	35.00	1	1	47.00	35.00	47	35
47.00	35.00	1	1	48.00	36.00	48	36
48.00	36.00	1	1	49.00	37.00	49	37
49.00	37.00	1	1	50.00	38.00	50	38
50.00	38.00	1	1	51.00	38.00	51	38
51.00	38.00	1	1	52.00	39.00	52	39
52.00	39.00	1	1	53.00	40.00	53	40
53.00	40.00	1	1	54.00	41.00	54	41
54.00	41.00	1	1	55.00	41.00	55	41
55.00	41.00	1	1	56.00	42.00	56	42
56.00	42.00	1	1	57.00	43.00	57	43
57.00	43.00	1	1	58.00	44.00	58	44
58.00	44.00	1	1	59.00	44.00	59	44
59.00	44.00	1	1	60.00	45.00	60	45
60.00	45.00	1	1	61.00	46.00	61	46
61.00	46.00	1	1	62.00	47.00	62	47
62.00	47.00	1	1	63.00	47.00	63	47
63.00	47.00	1	1	64.00	48.00	64	48
64.00	48.00	1	1	65.00	49.00	65	49
65.00	49.00	1	1	66.00	50.00	66	50
66.00	50.00	1	1	67.00	50.00	67	50
67.00	50.00	1	1	68.00	51.00	68	51
68.00	51.00	1	1	69.00	52.00	69	52
69.00	52.00	1	1	70.00	53.00	70	53
70.00	53.00	1	1	71.00	53.00	71	53
71.00	53.00	1	1	72.00	54.00	72	54
72.00	54.00	1	1	73.00	55.00	73	55
73.00	55.00	1	1	74.00	56.00	74	56
74.00	56.00	1	1	75.00	56.00	75	56
75.00	56.00	1	1	76.00	57.00	76	57
76.00	57.00	1	1	77.00	58.00	77	58
77.00	58.00	1	1	78.00	59.00	78	59
78.00	59.00	1	1	79.00	59.00	79	59
79.00	59.00	1	1	80.00	60.00	80	60