有多个业务，业务间可并行，但业务内需要顺序执行，利用java如何实现

[qq_27434143]

业务数是不确定的，也可将业务理解为人

[weixin_40852944]

public class Test {
    private static Integer total = 20;

    public static void main(String[] args) {
        System.out.println("目前总工作量"+total+"份，请输入工作人数:");
        Scanner scanner = new Scanner(System.in);
        Integer persons = scanner.nextInt();
        int var0 = total/persons;
        for(int i=0;i<persons;i++){
            new Thread(new Woker(var0,"Thread-"+i)).start();
        }
    }
}

class Woker implements Runnable{
    private Integer total;

    private String wokerName;

    public Woker(Integer total, String wokerName) {
        this.total = total;
        this.wokerName = wokerName;
    }

    @Override
    public void run(){
        for(int i = 0;i<total;i++){
            System.out.println(wokerName+"正在开始任务"+i);
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(wokerName+"已经完成任务"+i);
        }
    }
}