实验目的与要求:
使用类来封装对象的属性和行为;编写一个Java程序,该程序有两个类:Tank和Fight;
实验内容与操作:
package Tank;
public class Tank{
double speed;
int bulletAmount;
void speedUp(int s){
speed=s+speed;
}
void speedDown(int d){
if(speed-d>=0)
speed=speed-d;
else
speed=0;
}
void setBulletAmount(int m){
bulletAmount=m;
}
int getBulletAmount(){
return bulletAmount;
}
double getSpeed(){
return speed;
}
void fire(){
if(bulletAmount>=1){
bulletAmount=bulletAmount-1;
System.out.println("打出第一发炮弹");
}
else{
System.out.println("没有炮弹了,无法开火");
}
}
}
//新建一个类Fright
package Tank;
public class Fight{
public static void main(String args[]){
Tank tank1,tank2;
tank1=new Tank();
tank2=new Tank();
tank1.setBulletAmount(10);
tank2.setBulletAmount(10);
System.out.println("tank1的炮弹数量:"+tank1.getBulletAmount());
System.out.println("tank2的炮弹数量:"+tank2.getBulletAmount());
tank1.speedUp(80);
tank2.speedUp(90);
System.out.println("tank1目前的速度:"+tank1.getSpeed());
System.out.println("tank2目前的速度:"+tank2.getSpeed());
tank1.speedDown(15);
tank2.speedDown(30);
System.out.println("tank1目前的速度:"+tank1.getSpeed());
System.out.println("tank2目前的速度:"+tank2.getSpeed());
System.out.println("tank1开火");
tank1.fire();
System.out.println("tank2开火");
tank2.fire();
tank2.fire();
System.out.println("tank1的炮弹数量:"+tank1.getBulletAmount());
System.out.println("tank2的炮弹数量:"+tank2.getBulletAmount());
}
}
实验结果:
tank1的炮弹数量:10
tank2的炮弹数量:10
tank1目前的速度:80.0
tank2目前的速度:90.0
tank1目前的速度:65.0
tank2目前的速度:60.0
tank1开火
打出第一发炮弹
tank2开火
打出第一发炮弹
打出第一发炮弹
tank1的炮弹数量:9
tank2的炮弹数量:8