上机实践4课案.docx

实验一实验名称：机动车实验代码public class Vehicle{double speed;int power;voidspeedUp(int s){speed=speed+s;}voidspeedDown(int d){speed=speed-d;}voidsetPower(int p){power=p;}intgetPower(){return power;}doublegetSpeed(){return speed;}}public class User{public static void main(String args[]){Vehicle car1,car2;car1=new Vehicle();car2=new Vehicle();car1.setPower(128);car2.setPower(76);System.out.println(car1的功率是：+car1.getPower());System.out.println(car2的功率是：+car2.getPower());car1.speedUp(80);car2.speedUp(80);System.out.println(car1的目前速度是：+car1.getSpeed());System.out.println(car2的目前速度是：+car2.getSpeed());car1.speedDown(10);car2.speedDown(20);System.out.println(car1目前的速度：+car1.getSpeed());System.out.println(car2目前的速度：+car2.getSpeed());}}3．实验结果4.实验分析定义方法时，有一处竟然忘记加括弧，低级失误==本实验中主要是使用类来封装对象，在实验过程中，通过定义方法，构建对象进一步体会Java中类的作用，主要不熟的地方是创建对象，对对象进行赋值等操作。也就数适用new运算符和默认的构造方法创建对象。Car1=new Vehicle;5.实验后练习1，在代码后加上if(speed200){System.out.println(加速后你已超过200，不能加速);speed=speed-s;return;}2.if(speed0){System.out.println减速后你已小于0，不能小于0);speed=speed+a;return;}3.void Break{Speed=0;}实验二实验名称：家中的电视实验代码public class TV{int channel;voidsetChannel(int m){if(m=1){channel=m;}}intgetChannel(){return channel;}voidshowProgram(){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;voidbuyTV(TV tv){homeTV=tv;}voidremoteControl(int m){homeTV.setChannel(m);}voidseeTV(){homeTV.showProgram();}}public class Mainclass{public static void main(String args[]){TV hairTV=new TV();hairTV.setChannel(5);System.out.println(hairTV的频道是+hairTV.getChannel());Family zhangSanFamily=new Family();zhangSanFamily.buyTV(hairTV);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);zhangSanFamily.remoteControl(m);System.out.println(hairTV的频道是+hairTV.getChannel());