First try

src/ru/milandr/courses/polishchuk/Alcohol.java

@@ -0,0 +1,165 @@
+package ru.milandr.courses.polishchuk;
+
+public class Alcohol {
+	private String	name;
+	private String	manufacturer;
+	private double	degree;
+	private double	volume;
+	private Color	color;
+	private double	transparency;
+	private double	fillPercentage;
+	private double	age;
+
+	Alcohol() {
+		this.name = null;
+		this.manufacturer = null;
+		this.degree = 0.;
+		this.volume = 0.;
+		this.color = null;
+		this.transparency = 0.;
+		this.fillPercentage = 0.;
+		this.age = -1;
+	}
+
+	Alcohol(String name, String manuf, double degree, double volume, Color color, double transparency, double fillPercentage, int age) {
+		this.name = name;
+		this.manufacturer = manuf;
+		this.degree = degree;
+		this.volume = volume;
+		this.color = color;
+		this.transparency = transparency;
+		this.fillPercentage = fillPercentage;
+		this.age = age;
+	}
+
+	Alcohol(String name, String manuf, double degree, double volume) {
+		this(name, manuf, degree, volume, new Color(255, 255, 255), 1., 100., -1);
+	}
+
+	public void print() {
+		System.out.format(
+			"Name: %s\n" +
+			"Manufacturer: %s\n" + 
+			"Degree: %.1f\n" +
+			"Volume (mL): %.3f\n" +
+			"RGB Color: %X\n" +
+			"Transparency: %f\n" +
+			"Fill percentage: %.2f\n",
+				this.name,
+				this.manufacturer,
+				this.degree,
+				this.volume,
+				this.color.getRGB(),
+				this.transparency,
+				this.fillPercentage
+		);
+		this.printAge();
+	}
+
+	public String getName() {
+		return this.name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getManufacturer() {
+		return this.manufacturer;
+	}
+
+	public void setManufacturer(String mname) {
+		this.manufacturer = mname;
+	}
+
+	public double getDegree() {
+		return this.degree;
+	}
+
+	public void setDegree(double degree) {
+		this.degree = degree;
+	}
+
+	public double getVolume() {
+		return this.volume;
+	}
+
+	public void setVolume(double volume) {
+		this.volume = volume;
+	}
+
+	public Color getColor() {
+		return this.color;
+	}
+
+	public void setColor(Color color) {
+		this.color = color;
+	}
+
+	public void setColor(int rgb) {
+		this.color = new Color(rgb);
+	}
+
+	public void setColor(int r, int g, int b) {
+		this.color = new Color(r, g, b);
+	}
+
+	public double getTransparency() {
+		return this.transparency;
+	}
+
+	public void setTransparency(double transp) {
+		this.transparency = transp;
+	}
+
+	public double getFillPercentage() {
+		return this.fillPercentage;
+	}
+
+	public void setFillPercentage(double percent) {
+		this.fillPercentage = percent;
+	}
+
+	public double pourOut(double percent) {
+		double pouredOut = percent;
+
+		if (percent < 0.)
+			return 0.;
+		this.fillPercentage -= percent;
+		if (this.fillPercentage < 0.)
+		{
+			pouredOut = percent + this.fillPercentage;
+			this.fillPercentage = 0.;
+		}
+		return pouredOut;
+	}
+
+	public boolean isEmpty() {
+		if (this.fillPercentage == 0.)
+			return true;
+		return false;
+	}
+
+	public void printAge() {
+		System.out.print("Age: ");
+		if (this.age < 0)
+			System.out.println("Undefined");
+		else
+			System.out.format("%d\n", this.age);
+	}
+
+	public double getAge() {
+		return this.age;
+	}
+
+	public void setAge(double age) {
+		this.age = age;
+	}
+
+	public void addAge(double years) {
+		if (years < 0)
+			return;
+		this.age += years;
+	}
+
+}

src/ru/milandr/courses/polishchuk/Color.java

@@ -0,0 +1,50 @@
+package ru.milandr.courses.polishchuk;
+
+public class Color {
+	private int		rgb;
+
+	Color(int r, int g, int b) {
+		this.rgb = ((r & 0xff) << 16) | ((g & 0xff) << 8) | b & 0xff;
+	}
+
+	Color(int rgb) {
+		this.rgb = rgb;
+	}
+
+	public int getRGB() {
+		return this.rgb;
+	}
+
+	public int getR() {
+		return (this.rgb & (0xff << 16)) >>> 16;
+	}
+
+	public int getG() {
+		return (this.rgb & (0xff << 8)) >>> 8;
+	}
+
+	public int getB() {
+		return this.rgb & 0xff;
+	}
+
+	private void setColorWithShift(int color, int shift) {
+		if (shift <= 24)
+			this.rgb = this.rgb & (0xffffffff ^ ((color & 0xff) << shift));
+	}
+
+	public void setR(int r) {
+		this.setColorWithShift(r, 16);
+	}
+
+	public void setG(int g) {
+		this.setColorWithShift(g, 8);
+	}
+
+	public void setB(int b) {
+		this.setColorWithShift(b, 0);
+	}
+
+	public void setRBG(int rgb) {
+		this.rgb = rgb;
+	}
+}

src/ru/milandr/courses/polishchuk/Point.java

@@ -0,0 +1,48 @@
+package ru.milandr.courses.polishchuk;
+
+public class Point {
+	public double x;
+	public double y;
+
+	Point(double x, double y) {
+		this.x = x;
+		this.y = y;
+	}
+
+	public double getDistance(Point p) {
+		return Math.sqrt(Math.pow(this.x - p.x, 2) + Math.pow(this.y - p.y, 2));
+	}
+
+	public void printLineEquation(Point p) {
+		double k;
+
+		if (this.x == p.x)
+			System.out.format("x = %f\n", this.x);
+		else
+		{
+			k = (this.y - p.y) / (this.x - this.y);
+			System.out.format("y = %f * x %+f\n", k, this.y - k * this.x);
+		}
+	}
+
+	public Point getMiddle(Point p)
+	{
+		return new Point((this.x + p.x) / 2., (this.y + p.y) / 2.);
+	}
+
+	public void printCircleEquation(Point p)
+	{
+		Point middle = this.getMiddle(p);
+
+		System.out.format(
+			"(x %+.3f)^2 + (y %+.3f)^2 = (%.3f)^2\n",
+				-middle.x, -middle.y,
+				this.getDistance(p) / 2.
+		);
+	}
+
+	public void print()
+	{
+		System.out.format("(%f, %f)", this.x, this.y);
+	}
+}