作业调度问题

亦凉 2022-07-24 08:07 154阅读 0赞

import java.util.Collections;
    import java.util.Comparator;
    import java.util.PriorityQueue;
    import java.util.Scanner;
    import java.util.Vector;
    
    
    
    public class JobScheduling2 {
    
        static class Job implements Comparator<Job>{
            int id;
            double needTime;
            public Job(){
    
            }
            public Job(int id, double needTime){
                this.id = id;
                this.needTime = needTime;
            }
            @Override
            public int compare(Job o1, Job o2) {
                return (o1.needTime > o2.needTime)?-1:1;
            }
            public String toString(){
                return ""+needTime;         
            }
    
        }
        static class Machine implements Comparator<Machine>{
            int id;
            double runningTime;
            Vector<Job> taskList;
    
            public Machine(int id, double runningTime){
                this.id = id;
                this.runningTime = runningTime;
                this.taskList = new Vector<Job>();
            }
            public Machine(){this.taskList = new Vector<Job>();}
    
            @Override
            public int compare(Machine o1, Machine o2) {
                return o1.runningTime>o2.runningTime?1:-1;
            }
    
        }
        public static void main(String[] args) {
    
            Scanner scan = new Scanner(System.in);
    
            int n;  //作业个数
            int m;  //机器数
            while(scan.hasNext()){
                n = scan.nextInt();
                m = scan.nextInt();
    
                Vector<Job> jobs = new Vector<>();
                for(int i=0; i<n; i++){
                    jobs.add(new Job(i+1, scan.nextDouble()));
                }
                Collections.sort(jobs, new Job());
    
    //          for(int i=0; i<n; i++){
    //              System.out.print(jobs.get(i).needTime + " ");
    //          }
                PriorityQueue<Machine> pqMachine = new PriorityQueue<Machine>(new Machine());
    
                for(int i=0; i<m; i++){
                    pqMachine.add(new Machine(i+1, 0));
                }
                for(int i=0; i<n; i++){
                    Machine machine = pqMachine.poll();
                    machine.runningTime += jobs.get(i).needTime;
                    machine.taskList.add(jobs.get(i));
                    pqMachine.add(machine);
                }
                while(pqMachine.size()>0){
                    Machine machine = pqMachine.poll();
                    System.out.print("第" + machine.id + "台机器工作时间是：" + machine.runningTime);
                    System.out.print("  这些任务(任务所需时间)工作在这台机器上：");
                    for(int j=0; j<machine.taskList.size(); j++){
                        System.out.print(machine.taskList.get(j).needTime + " ");
                    }
                    System.out.println();
                }
    
    
            }
    
        }
    
    }