马家河⼦java,java上机任务（四）———CSDN我⼜回来了public class Text {
/**
* 程序⼊⼝
*/
public static void main(String[] args) {
Vehicle car1,car2;
//使⽤new运算符和默认的构造⽅法创建对象car1
car1=new Vehicle();
//使⽤new运算符和默认的构造⽅法创建对象car2
car2=new Vehicle();
car1.setPower(128);
car2.setPower(76);
System.out.println("car1的功率是："+Power());
System.out.println("car2的功率是："+Power());
//car1调⽤speedUp()⽅法将⾃⼰的speed的值增加80
car1.speedUp(80);
//car2调⽤speedUp()⽅法将⾃⼰的speed的值增加80
car2.speedUp(80);
System.out.println("car1⽬前的速度："+Speed());
System.out.println("car1⽬前的速度："+Speed());
car1.speedDown(10);
car2.speedDown(20);
System.out.println("car1⽬前的速度："+Speed());
System.out.println("car1⽬前的速度："+Speed());
//家中的电视
Tv haierTv=new Tv();
//haierTv调⽤setChannel(int m)，并向参数m传递5
haierTv.setChannal(5);
System.out.println("haierTv的频道是"+Channel());
Family zhangsanFamily=new Family();
//zhangsanFamily调⽤void buyTv(Tv tv)⽅法，并将haierTv传递给参数Tv
zhangsanFamily.buyTv(haierTv);
System.out.println("zhangsanFamily开始看电视节⽬");
zhangsanFamily.seeTv();
int m=2;
System.out.println("zhangsanFamily将电视更换到"+m+"频道");
System.out.println("haierTv的频道是"+Channel());
System.out.println("zhangsanFamily再看电视节⽬");
zhangsanFamily.seeTv();
//共饮同井⽔
//⽤类名调⽤setWaterAmount(int m)，并向参数传值200
Village.setWaterAmount(200);
int leftWater=Village.waterAmount; //⽤Village类的类名访问waterAmount
System.out.println("⽔井中有"+leftWater+"升⽔");
Village zhaoZhuang,maJiaHeZi;
zhaoZhuang=new Village("赵庄");
maJiaHeZi=new Village("马家河⼦");
zhaoZhuang.setPeopleNumber(80);
maJiaHeZi.setPeopleNumber(120);
//zhaoZhuang调⽤drinkWater(int n)，并向参数传值50
zhaoZhuang.drinkWater(50);
leftWater=maJiaHeZi.lookWaterAmount(); //maJiaHeZi调⽤lookWaterAmount()
String name=maJiaHeZi.name;
System.out.println(name+"发现⽔井中有"+leftWater+"升⽔");
maJiaHeZi.drinkWater(100);
leftWater=zhaoZhuang.lookWaterAmount();//zhaozhuang调⽤lookWaterAmount()⽅法name=zhaoZhuang.name;
System.out.println(name+"发现⽔井中有"+leftWater+"升⽔");
int PeopleNumber();
System.out.println("赵庄的⼈⼝："+peopleNumber);
PeopleNumber();
System.out.println("马家河⼦的⼈⼝："+peopleNumber);
// TODO Auto-generated method stub
}
}
public class Vehicle {
//声明double型变量speed，刻画速度
double speed;
//声明int型变量power，刻画功率
int power;
void speedUp(int s){
//将参数s的值与成员变量speed的和赋值给成员变量speed speed=speed+s;
}
void speedDown(int d){
//将成员变量speed与参数d的差赋值给成员变量speed speed=speed-d;
}
void setPower(int p){
/
/将参数p的值赋值给成员变量power
power=p;
}
int getPower(){
//返回成员变量power的值
return power;
}
double getSpeed(){
return speed;
}
}
public class Tv {
int channel;//电视频道
void setChannal(int m){
if(m>=1){
channel=m;
}
}
int getChannel(){
return channel;
}
void showProgram(){
switch(channel){
case 1:System.out.println("综合频道");
break;
case 2:System.out.println("经济频道");
break;
case 3:System.out.println("⽂艺频道");
break;
case 4:System.out.println("国际频道");
break;
case 5:System.out.println("体育频道");
break;
default :System.out.println("不能收看"+channel+"频道");
}
}
}
public class Family {
Tv homeTv;
void buyTv(Tv tv){
//将参数tv赋值给homeTv
homeTv=tv;
}
void remoteComtrol(int m){
homeTv.setChannal(m);
}
void seeTv(){
homeTv.showProgram();//homeTv调⽤showProgram()⽅法}
}
public class Village {
static int waterAmount;//模拟⽔井的⽔量
int peopleNumber;//村庄的⼈数
String name;
Village(String s){
name=s;
}
static void setWaterAmount(int m){
if(m>0)
waterAmount=m;
}
void drinkWater(int n){
if(waterAmount-n>=0){
waterAmount=waterAmount-n;
System.out.println(name+"喝了"+n+"升⽔"); }
else
waterAmount=0;
}
static int lookWaterAmount(){
java面试题csdnreturn waterAmount;
}
void setPeopleNumber(int n){ peopleNumber=n;
}
int getPeopleNumber(){
return peopleNumber;
}
}