求修改，java报错Index 0 out of bounds for length 0（在eclipse里）

Question

代码
package traffic;
import java.lang.reflect.InvocationTargetException;

public class ComputerTime
{
public static void main(String[] args)
{
System.out.println("交通工具是："+args[0]);
System.out.println("参数A"+args[1]);
System.out.println("参数B"+args[2]);
System.out.println("参数C"+args[3]);
double a=Double.parseDouble(args[1]);
double b=Double.parseDouble(args[2]);
double c=Double.parseDouble(args[3]);
double v,t; // 定义速度，时间
try
{
Common d=(Common) Class.forName("expp4."+args[0]).getDeclaredConstructor().newInstance();
v=d.speed(a,b,c);
t=1000/v;
System.out.println("平均速度:"+v+"km/h");
System.out.println("运行时间:"+t+"h");
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e)
{
System.out.println("class not found");
}
}
}
报错
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
at p22/traffic.ComputerTime.main(ComputerTime.java:8)

Answer 1

配置运行参数就可以了！

运行后的效果