余涛 java第二次作业

public class yt {
    public static Map> groupByFirstChar(List data){
        Map> result = new HashMap<>();
        for(Employee e : data){
         //   String c = e.Cid;
         //   String c = e.gz;
            String c = e.age;
            List l = result.get(c);
            if(l == null){
            l = new ArrayList<>();
             result.put(c, l);}
            l.add(e);}
        return result;
    }

public static void main(String[] args) {
        Employee e1 = new Employee("W1","WS1","Chisel","15636545896","special","5");
        Employee e2 = new Employee("W2","WS1","Asa","","expert","0");
        Employee e3 = new Employee("W3","WS1","Parker","16533635623","common","1");
        Employee e4 = new Employee("W4","WS1","Ron","16266589956","common","0");
        Employee e5 = new Employee("W5","WS1","Tyler","","common","0");
        Employee e6 = new Employee("W6","WS1","Tony","15659596235","common","0");
        Employee e7 = new Employee("W7","WS1","August","","common","0");
        Employee e8 = new Employee("W8","WS2","Sam","14665684568","special","5");
        Employee e9 = new Employee("W9","WS2","Klee","18845489887","expert","3");
        Employee e10 = new Employee("W10","WS2","Webb","54659845642","common","1");
        Employee e11 = new Employee("W11","WS2","Jared","","common","0");
        Employee e12 = new Employee("W12","WS2","Moore","","common","0");
        Employee e13 = new Employee("W13","WS2","June","15498989875","common","0");
        Employee e14 = new Employee("W14","WS2","Reg","18446894487","common","0");

List date = Arrays.asList(e1,e2,e3,e4,e5,e6,e7,e8,e9,e10,e11,e12,e13,e14);
        Map> map = groupByFirstChar(date);
        Set set = map.keySet();
        for (String key : set) {
            System.out.println(key+"  "+map.get(key));
        }
    }
}