Node.java

public class Node {
    private int no;
    private int color;
    private int degree;
    private int dsat;

    public Node(int no) {
        this.no = no;
        color = -1;
        degree = 0;
        dsat = 0;
    }

    public String toString() {
        return String.format("no: %d color: %d degree: %d dsat: %d\n", no, color, degree, dsat);
    }

    public int getNo() {
        return no;
    }

    public int getColor() {
        return color;
    }

    public int getDegree() {
        return degree;
    }

    public int getDsat() {
        return dsat;
    }

    public void setNo(int no) {
        this.no = no;
    }

    public void setColor(int color) {
        this.color = color;
    }

    public void setDegree(int degree) {
        this.degree = degree;
    }

    public void setDsat(int dsat) {
        this.dsat = dsat;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null || obj.getClass() != this.getClass())
            return false;

        var node = (Node) obj;
        return this.no == node.no;
    }
}