允许用户使用多线程输入斐波那契数列和阶乘计算的线程数

Question

我想使用扫描仪来获取用户输入的要运行的线程数。到目前为止，该java代码能够运行斐波那契数列的数量以及基于用户输入的阶乘计算。如何允许用户输入线程数？：

import java.io.IOException; 导入java.util.Scanner；

斐波那契类扩展了线程 {

@Override
public void run() {
    
        
    int n1=0, n2=0, n3=1;
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the amount of Fibonacci: ");
    int number = sc.nextInt();
    for(int i=1; i<=number; i++) {
        n1 = n2;                                
        n2 = n3;
        n3 = n1 + n2;
        System.out.println(n1 + "  ");
    }
        

        
        }
    }

阶乘类扩展了线程 {

@Override
public void run() {
    try {
        
            long fact = 1;
            int i = 1, n;
            Scanner input = new Scanner(System.in);
            System.out.print("Enter a number for the calculation of Factorial:    ");
            n = input.nextInt();
            input.close();
            
            while(i<=n)
            {
                fact = fact * i;
                i++;
            }
            System.out.println("Factorial of "+n+" is: "+fact);
            
                
        
            
    } catch (NumberFormatException ex) {

    }
}

}

公共类Assignment02 {

public static void main(String args[]) throws IOException {
    Scanner input = new Scanner(System.in);
    System.out.println("1.Fibonacci");
    System.out.println("2.Factorial");
    System.out.println("Choose your Option:");
    String line = input.nextLine();
    int option = Integer.parseInt(line);
    
    switch (option) {
        case 1:
            System.out.println("Fibonacci Sequence SELECTED");
            try {

                Fibonacci fib = new Fibonacci();
                fib.start();
                fib.join();
                

            } catch (Exception e) {
            }

            break;

        case 2:
            System.out.println("Factorial SELECTED");
            try {
                
                Factorial fact = new Factorial();
                fact.start();
                fact.join();
                
            } catch (Exception e) {
            }
            break;

        default:
            System.out.println("Choose a valid option");
            break;
    }
    

} }