/* Interface: Association
 */

public interface Association<ValueType> {
	public String getKey();
	public ValueType getValue();
}

import java.awt.Graphics;

public interface Drawable {

	//Draw this object on graphics (canvas)
	public void drawOn(Graphics g);

	//Move this object by x and y
	public void moveBy(int x, int y);

	//Grow this object factor
	//e.g. factor=2 would double size
	public void growBy(double factor);

}

import java.util.List;

public interface Report {

	public void showText(String text);
	public void showTitle(String title);
	public void showHeading(String heading, boolean isBold);
	public void showTable(List<List<String>> tableData);

}

/* A warm hello
 * I'm a Weighable type (interface)
 * I know how to do one thing: Answer a weight. */

public interface Weighable {
	public int getWeight();
}

import java.io.PrintStream;

/* Interface Printable
 * I know how to print myself on a report */

public interface Printable {
	public void printOn(PrintStream report);
}