How to solve null pointer exception in steams, list array?

import java.util.stream.Stream;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
import java.util.stream.Collectors;
import java.util.ArrayList;
import java.util.Collections;
public class EmployeeUtility {

//@NotNull
public Employee[] getEmployeeDetails(String[] details) {

	//Fill your code here
	Employee[] emp_arr=new Employee[details.length];
	for(int i=0;i<details.length;i++)
{
    string[] split_details="details[i].split(";");
    system.out.println(split_details[0]+" "+split_details[1]+" "+split_details[2]);
    emp_arr[i].setempid( split_details[0]);
    emp_arr[i].setempname( split_details[1]);
    emp_arr[i].setsalary( double.valueof(split_details[2]));
 
 }
 return emp_arr;



 }

 public stream<employee=""> getStreamOfEmployee(Employee[] empDetails) {

		//Fill your code here
		
		Stream emp_stream=Arrays.stream(empDetails);
        return emp_stream;


	}

	public String[] shortlistedEmployee(Stream<employee> empStream,double minSalary) {

		//Fill your code here
		List<string> result=new ArrayList<string>();
		List<employee> empList=empStream.collect(Collectors.toList());
		int i=0;
		for(Employee obj:empList)
		{
		    String str="";
		    if(obj.getSalary()>=minSalary)
		    {
		        str=obj.getEmpId()+";"+obj.getEmpName()+";"+obj.getSalary();
		        result.add(str);
		    }
		}
		Collections.sort(result);
		String[] result_array=result.toArray(new String[result.size()]);
		//Collections.sort(result_array);
		return result_array;
	}

}



public class Employee {
	private String empId;
	private String empName;
	private double salary;

	public String getEmpId() {
		return empId;
	}
	public void setEmpId(String empId) {
		this.empId = empId;
	}
	public String getEmpName() {
		return empName;
	}
	public void setEmpName(String empName) {
		this.empName = empName;
	}
	public double getSalary() {
		return salary;
	}
	public void setSalary(double salary) {
		this.salary = salary;
	}
}



<pre>import java.util.Scanner;
//DO NOT EDIT OR DELETE
public class Main {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		EmployeeUtility utilObj=new EmployeeUtility();
		System.out.println("Enter the number of Employees");
		int n=sc.nextInt();
		sc.nextLine();
		if(n>0) {
			System.out.println("Enter the details of Employees");
			String [] details=new String[n];
			for(int i=0;i<n;i++) {
 details[i]="sc.nextLine();
}
 system.out.println("enter the minimum eligible salary");
 double minsalary="sc.nextDouble();

string[] result="utilObj.shortlistedEmployee(utilObj.getStreamOfEmployee(utilObj.getEmployeeDetails(details)),minSalary);
if(result.length="">0)	{
				System.out.println("Shortlisted Employees are");
				for(String s:result) {
					System.out.println(s);
				}
			}
			else {
				System.out.println("No Employee is having the required salary");
			}
		}
		else
		{
			System.out.println("Invalid Input");
		}
	}
}