package step1;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
public class Students {
private List<Student> stuList;
private Map<Integer,Student> stuMap;
public Students(List<Student> stuList) {
super();
this.stuList = stuList;
}
public Students(Map<Integer, Student> stuMap) {
super();
this.stuMap = stuMap;
}
public Students() {
super();
}
public List<Student> getByAvgScore(double score) {
List<Student> reList = new ArrayList<Student>();
Student students[] = new Student[stuList.size()];
int cont=0;
for(Student s:stuList) {
if(s.getAvgScore()==score) {
students[cont]=s;
cont++;
}
}
for(int i=0;i<cont-1;i++)
{
for(int j=0;j<cont-1-i;j++)
{
if(students[j].getAge()>students[j+1].getAge())
{
Student temp=students[j];
students[j]=students[j+1];
students[j+1]=temp;
}
}
}
for(int i=0;i<cont;i++) {
reList.add(students[i]);
}
return reList;
}
public Map<Double, List<Student>> getByAvgScores(){
Map<Double,List<Student>> reMap=new HashMap<>();
double avgArray[] = new double[stuList.size()];
int cont=0;
Set<Map.Entry<Integer, Student>> entrySet = stuMap.entrySet();
for(Map.Entry<Integer, Student> item : entrySet) {
double temp = item.getValue().getAvgScore();
boolean flag=true;
for(int i = 0;i<cont;i++) {
if(avgArray[i]==temp) flag=false;
}
if(flag) {
avgArray[cont]=temp;
cont++;
}
}
for(double temp:avgArray) {
reMap.put(temp, getByAvgScore(temp));
}
return reMap;
}
}