Java代写代考

package uk.ac.liv.comp285.cw1; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Toolkit; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; public class CanvasFrame extends JFrame { private JPanel contentPane; /** * Launch the application. */ public static void showShapes() { panelCanvas=new PanelCanvas(); EventQueue.invokeLater(new Runnable() { public void run() { try { CanvasFrame frame = new CanvasFrame(); frame.setVisible(true); } catch

package uk.ac.liv.comp285.cw1.shapes; import java.awt.Graphics; import uk.ac.liv.comp285.cw1.Shape; public class Rectangle extends Shape { public Rectangle(float x, float y, float width, float height) { super(); this.x = x; this.y = y; this.width = width; this.height = height; } private float x,y,width,height; @Override public float getArea() { return(width*height); } @Override public Point getLowerLeftPoint() { return((new Point(x,y)).rotate(rotationOrigin, angle)); }

package uk.ac.liv.comp285.cw1; import java.awt.Graphics; import java.util.Vector; import javax.swing.JPanel; @SuppressWarnings(“serial”) public class PanelCanvas extends JPanel { private Vector allShapes=new Vector (); public void addShape(IShape shape) { allShapes.add(shape); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); allShapes.forEach((shape)-> { shape.render(g); } ); } }