JAVA抽象类实验代码.docVIP

1.抽象类(注：前5个类的主函数没有测试，直接在最后一个测试类中测试的)(1)package com.drawing;public abstract class Shape abstract void draw(); (2)package com.drawing;public class Point extends Shape private int x; private int y; public Point(int x,int y) super(); this.x=x; this.y=y; public Point() this.x=0; this.y=0; public int getX() return x;public void setX(int x) this.x = x;public int getY() return y;public void setY(int y) this.y = y; public void draw() System.out.println(Point is drawing!); public void print() System.out.println(x=+x+ y=+y); public static void main(String args) (3)package com.drawing;public class Line extends Shapeprivate Point pStart=null;private Point pEnd=null;public Line(Point pStart,Point pEnd)super();this.pStart=pStart;this.pEnd=pEnd;public Line()super();public Point getpStart() return pStart;public void setpStart(Point pStart) this.pStart = pStart;public Point getpEnd() return pEnd;public void setpEnd(Point pEnd) this.pEnd = pEnd;public String toString()return Line:+pStart.toString()+pEnd.toString();public void draw()System.out.println(Line is drawing!);public void print()System.out.println(pStart:+pStart.getX()+,+pStart.getY()+;pEnd:+pEnd.getX()+,+pEnd.getY();public boolean equals(Object o)if(this=o)return true;if(o=null)return false;if(o.getClass()!=this.getClass()return false;elseLine l=(Line)o;if(l.pStart=this.pStart&l.pEnd=this.pEnd)return true;elsereturn false;public double distance()return Math.sqrt(pStart.getX()-pEnd.getX()*(pStart.getX()-pEnd.getX()+(pStart.getY()-pEnd.getY()*(pStart.getY()-pEnd.getY();public static void main(String args)(4)package com.drawing;public class Circle extends Shapeprivate Point center=null;private double radius=0;public Circle(Point center,double radius)super();this.center=center;this.radius=radius;public Circle()super();public void draw()System.out.println(Center is drawing!);public String toString()return center:+(+center.getX()+,+center.getY()+)+,+radius:+radius;public void print()System.out.println(center is +(+center.getX()+,+center.getY()+)+;+radius is:+radius);public double area()return Math.PI*radius*radius;public double circurmference()return Math.PI*radius*2;public static void main(String args)(5)package com.drawing;public class Rectangle extends Shape private Point pLefttop=null;private Point pRightbottom=null;public Rectangle(Point pLefttop, Point pRightbottom) super();this.pLefttop = pLefttop;this.pRightbottom = pRightbottom;public Rectangle() super();public Point getpLefttop() return pLefttop;public void setpLefttop(Point pLefttop) this.pLefttop = pLefttop;public Point getpRightbottom() return pRightbottom;public void setpRightbottom(Point pRightbottom) this.pRightbottom = pRightbottom;public void draw()System.out.println(Rectangle is drawing!);public boolean equals(Object o)if(this=o)return true;if(o=null)return false;if(o.getClass()!=this.getClass()return false;elseRectangle e=(Rectangle)o;if(e.getpLefttop().equals(this.pLefttop) & e.getpRightbottom().equals(this.pRightbottom)return true;elsereturn false;public double area()return Math.sqrt(Math.pow(pLefttop.getX()-pRightbottom.getX(),2)*Math.sqrt(Math.pow(pLefttop.getY()-pRightbottom.getY(),2);public double circurmference()return Math.abs(pLefttop.getX()-pRightbottom.getX()*2+Math.abs(pLefttop.getY()-pRightbottom.getY()*2;public static void main(String args)(6)package com.drawing;public class Test public static void main(String args) Point p=new Point(1,2);p.print();p.draw();Point p4=new Point(5,3);Point p5=new Point(3,4);Line line=new Line(p4,p5);Line l1=new Line(new Point(5,3),new Point(3,4);line.draw();line.print();Shape s=line;s=new Point(5,9);(Point)s).print();System.out.println(line.equals(l1);System.out.println(Diatance is :+line.distance();Point p1=new Point(1,1);Circle c1=new Circle(p1,2);Circle c2=new Circle(new Point(0,1),3);c1.print();System.out.println(c1);c1.draw();System.out.println(area is :+c1.area();System.out.println(circurmference is :+c1.circurmference();Shape s1=new Circle(new Point(3,2),4);(Circle)s1).print();System.out.println(c1.equals(c2);运行结果：x=1 y=2Point is drawing!Line is drawing!pStart:5,3;pEnd:3,4x=5 y=9falseDiatance is :2.23606797749979center is (1,1);radius is:2.0center:(1,1),radius:2.0Center is drawing!area is :12.566370614359172circurmference is :12.566370614359172center is (3,2);radius is:4.0false2.定时器import java.awt.event.*;import java.util.*;import javax.swing.*;import javax.swing.Timer;public class TimePrinter implements ActionListener public void actionPerformed(ActionEvent event) System.out.println(Hello Curreat Data is:+new Date(); public static void main(String args) ActionListener listener=new TimePrinter(); Timer t=new Timer(2000, listener); t.start(); JOptionPane.showConfirmDialog(null, exit); System.exit(0); 运行结果：Hello Curreat Data is:Thu May 19 19:13:18 CST 2011Hello Curreat Data is:Thu May 19 19:13:20 CST 2011Hello Curreat Data is:Thu May 19 19:13:22 CST 2011Hello Curreat Data is:Thu May 19 19:13:24 CST 2011Hello Curreat Data is:Thu May 19 19:13:26 CST 2011Hello Curreat Data is:Thu May 19 19:13:28 CST 2011等等.