我有一个代表赛车的类,在它的内部我有一个方法,每当汽车通过 1000 int 检查点时就会打印到控制台。
在运行覆盖中,我调用该方法,它应该为我创建的每辆车以不同的方式运行,但我认为我出错了,因为结果每次都会改变(它需要保持不变,因为有些车更快,所以我不认为汽车在不同的线程中移动)。
public class RacingCar extends Thread{
private String model;
private int speed;
public RacingCar(){}
public RacingCar(String model, int speed){
this.start();
this.model = model;
this.speed = speed;
}
public void go(){
int trackLength=5000;
int checkPointPassed=0;
for(int i=0;i<trackLength;i+=speed){
if(checkPointPassed*1000<i){
checkPointPassed++;
System.out.println(this.model+" has passed the "+checkPointPassed+"th check point");
}
}
}
@Override
public void run() {
go();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}}
测试人员(主要):
public class Tester {
public static void main(String[] args) {
new RacingCar("Honda", 6);
new RacingCar("Lamborghini", 100);
new RacingCar("McLaren", 8);
}}
最佳答案
您应该在循环内移动 sleep ,并在启动线程之前完全创建 RacingCar。
public class RacingCar extends Thread {
private String model;
private int speed;
public RacingCar(String model, int speed) {
this.model = model;
this.speed = speed;
}
@Override
public void run() {
try {
go();
} catch(InterruptedException e) {
e.printStackTrace();
}
}
private void go() throws InterruptedException {
int trackLength = 5000;
int checkPointPassed = 0;
for(int i = 0; i < trackLength; i += speed) {
if(checkPointPassed * 1000 < i) {
checkPointPassed++;
System.out.println(this.model + " has passed the " + checkPointPassed + "th check point");
}
Thread.sleep(10);
}
}
}
public class Tester {
public static void main(String[] args) {
RacingCar honda = new RacingCar("Honda", 6);
RacingCar lamborghini = new RacingCar("Lamborghini", 100);
RacingCar mcLaren = new RacingCar("McLaren", 8);
honda.start();
lamborghini.start();
mcLaren.start();
}
}
(请注意,即使您这样做,也无法严格保证线程的运行顺序。)
关于Java多线程赛车模拟问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33334991/