public class Car {
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private int num;//编号
private String name;//型号
private double price;//单价
/**
* 无参构造
*/
public Car(){
super();
}
/**
* 有参构造
* @param num
* @param name
* @param price
*/
public Car(int num, String name, double price) {
super();
this.num = num;
this.name = name;
this.price = price;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String inforShow() {
return "Car [num=" + num + ", name=" + name + ", price=" + price + "]";
}
}
public class PriCar extends Car{
private int PersonNum;//最大载客量
public PriCar(int personNum) {
super();
PersonNum = personNum;
}
public PriCar() {
super();
}
public int getPersonNum() {
return PersonNum;
}
public void setPersonNum(int personNum) {
PersonNum = personNum;
}
@Override
public String inforShow() {
return "PriCar [PersonNum=" + PersonNum + "]";
}
}
public class VanCar extends Car {
private double weight;//最大载重
public VanCar(double weight) {
super();
this.weight = weight;
}
public VanCar() {
super();
}
@Override
public String inforShow() {
return "PriCar [num=" + super.getNum() + ", name=" + super.getName() + ", price=" + super.getPrice() +",weight=" + weight + "]";
}
}
测试类不想写了 应该可以自己写出来了吧
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import com.me.util.JFrameUtil;
public class SwingCar extends JFrame {
private final int rect_Width = 80;
private final int rect_Height = 50;
private final int radius = 15;
private final int arcAngle = 30;
private Point p = new Point();
public SwingCar() {
setSize(500, 300);
setVisible(true);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JFrameUtil.toCenter(this);
p = new Point(getWidth() / 2, getHeight() / 2);
move();
}
@Override
public void paint(Graphics g) {
super.paint(g);
drawRect(p);
drawRolls(p);
g.drawLine(0,getHeight()/2+rect_Height/2+radius, getWidth(), getHeight()/2+rect_Height/2+radius);
}
public void drawRect(Point c) {
Graphics2D g = (Graphics2D) getGraphics();
g.setColor(Color.red);
g.drawRect((int) (c.getX() - rect_Width / 2),
(int) (c.getY() - rect_Height / 2), rect_Width, rect_Height);
g.setColor(Color.black);
g.drawLine((int) (c.getX() - rect_Width / 2)-50, (int) (c.getY() - rect_Height / 2)-rect_Height/2, (int) (c.getX() - rect_Width / 2), (int) (c.getY() - rect_Height / 2)+rect_Height/2);
g.setColor(Color.green);
g.fillOval((int) (c.getX() - rect_Width / 2)-50-2, (int) (c.getY() - rect_Height / 2)-rect_Height/2-2, 10, 10);
}
public void drawRolls(Point c) {
Graphics2D g = (Graphics2D) getGraphics();
g.setColor(Color.blue);
// first roll
g.fillOval((int) (c.getX() - rect_Width / 4 - radius), (int) (c.getY()
+ rect_Height / 2 - radius), radius * 2, radius * 2);
g.setColor(Color.green);
g.fillArc((int) (c.getX() - rect_Width / 4 - radius), (int) (c.getY()
+ rect_Height / 2 - radius), radius * 2, radius * 2,
calcAngle(c), arcAngle);
// second roll
g.setColor(Color.blue);
g.fillOval((int) (c.getX() + rect_Width / 4 - radius), (int) (c.getY()
+ rect_Height / 2 - radius), radius * 2, radius * 2);
g.setColor(Color.green);
g.fillArc((int) (c.getX() + rect_Width / 4 - radius), (int) (c.getY()
+ rect_Height / 2 - radius), radius * 2, radius * 2,
calcAngle(c), arcAngle);
}
public int calcAngle(Point c) {
Point center = new Point(getWidth() / 2, getHeight() / 2);
double distance = c.getX() - center.getX();
int angle = (int) (180 * distance / (Math.PI * radius));
return -angle;
}
public void move() {
this.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
p.translate(2, 0);
} else if (e.getKeyCode() == KeyEvent.VK_LEFT) {
p.translate(-2, 0);
}
repaint();
}
});
}
public static void main(String[] args) {
SwingCar sc = new SwingCar();
}
}
public class Car {
private String color;//颜色
private int door;//车门数量
private float speed;//车速
public Car(){
this.color = "红色";
this.door = 3;
this.speed = 110;
}
public Car(String color, int door, float speed) {
this.color = color;
this.door = door;
this.speed = speed;
}
public void start(){
//汽车启动。输出汽车已启动，并输出汽车的各个属性
System.out.println("汽车已启动，汽车颜色为"+color+",车门数为"+door+",车速为"+speed);
}
public void speedUp(float speed){
//加速
System.out.println("汽车加速到"+speed+"km/h");
}
public void shutDown(float speed){
//减速
System.out.println("汽车减速到"+speed+"km/h");
}
public void brake(){
//刹车
System.out.println("已刹车");
}
}
public class Test {
public static void main(String[] args){
Car car = new Car();
car.start();
car.speedUp(100);
car.shutDown(60);
car.brake();
Car car1 = new Car("白色",4,20.2F);
car1.start();
car1.speedUp(100);
car1.shutDown(60);
car1.brake();
}
}
运行结果
import java.lang.*;
class Car{
public void safe(){
System.out.println("an quan xi shu gao !");
}
}
class Benz extends Car{
public void safe(){
System.out.println("che hao !");
}
}
class Santana extends Car{
public void safe(){
System.out.println("che hen bu hao hao !");
}
}
public class Test{
public static void main(String[]args){
Car s = new Car();
s.safe();
Benz s1 = new Benz();
s1.safe();
Santana s2 = new Santana();
s2.safe();
Car s3 = new Benz();
s3.safe();
Car s4 = new Santana();
s4.safe();
}
}
这是一个 命名为Test.java
public class Car{
double price;
String name;
int id;
//3个重载的构造方法(name)(id,name)(id,name,price)
public Car(String name){
this(789,name);
}
public Car(int id,String name){
this(id,name,100000);
}
protected Car(int id,String name,double price){
this.price = price;
this.name = name;
this.id = id;
}
//3个重载的普通方法drive(int) drive(String) drive(int ,String)
public void drive(int i){
System.out.println("i = " + i);
System.out.println(price + "\n" + name + "\n" + id);
}
protected String drive(String s){
return "s is: " + s;
}
int drive(int i,String s){
return 2007;
}
}
class Test{
public static void main(String[]args){
Car c1 = new Car(777,"Santana");
c1.drive(18);
}
}
这个命名为Car.java
希望有你要的!
