public class Marker {
	
	private String color;
	private double ink = 15000;
	private final int INK_PER_CHAR = 1; 
	private final double TOLERANCE = 0.001;
		
	public Marker() {
    }
    
    public Marker(String color) {
    	this.color = color;
    }
    
    public Marker(double ink) {
    	this.ink = ink;
    }
    
    public Marker(String color, int ink) {
    	this.color = color;
    	this.ink = ink;
    }
    
    public double write (String sentence)
    {
    	return ink -= INK_PER_CHAR * sentence.length();
    }
    
    public String getColor()
    {
    	return color;
    }
    
    public void setColor(String color)
    {
    	this.color = color;
    }
    
    public void setInk(double ink)
    {
    	this.ink = ink;
    }
    
    public double getInk()
    {
    	return ink;
    }
    
    public void refill()
    {
    	setInk(15000);
    }
    
    public String toString()
    {
    	return "Color is "+color+" amount of ink is "+ink ;
    }  
    	
    public boolean equals (Marker other)
    {
    	return  Math.abs(this.ink-other.getInk()) < TOLERANCE
    		&& this.color.equals(other.getColor()) ;
    }
    
    public int compareTo (Marker other)
    {
    	if (Math.abs(this.ink - other.getInk()) < TOLERANCE)
    		return 0;
    	else
    		return (int)(this.ink - other.getInk()) ;
    }
}