how to Print out the employee details having highest and second highest salary? - arraylist

Question

csv file which has 3 entries of empname,emp id,designation and salary Robert,33,Manager,12000 Duval,23,Associate,6000 Kierron,33,AD,20000
From below code how to Print out the employee details having the highest and second highest salary?
enter code here
public class HighSalary {
public static void highSalary() throws IOException {
String record;
BufferedReader br = new BufferedReader(new FileReader("/Users/ak/Documents/emp.csv"));
System.out.println("\t\t Printing Employee Details of Highest & Second Highest Salary \n");
System.out.println(" ------------------------------------------------------------- ");
System.out.println("| ID Name Age Address |");
System.out.println(" ------------------------------------------------------------- ");
List<List<String>> arlist = new ArrayList<>();
int highestSal = 0;
int secondSal = 0;
while ((record = br.readLine()) != null) {
String[] words = record.split(",");
arlist.add(Arrays.asList(words));
int salary = Integer.parseInt(words[3]);
if (highestSal == 0) {
highestSal = salary;
secondSal = salary;
}
else if (salary > highestSal) {
secondSal = highestSal;
highestSal = salary;
}
else if (salary > secondSal || secondSal == 0) {
secondSal = salary;
}
}
System.out.println("highest salary: " + highestSal);
System.out.println("second highest salary: " + secondSal);
br.close();
}
}
enter code here

Answer 1

You may iterate the file, keeping track of the highest and second highest salary. When assigning a new highest salary, the second highest should be assigned to the previous highest salary. Also, you may store two strings for the metadata associated with the highest and second highest paid employees.
Integer highest = null;
Integer second = null;
String highEmp = "";
String secondEmp = "";
while ((record = br.readLine()) != null) {
String[] words = record.split(",");
arlist.add(Arrays.asList(words));
int salary = Integer.parseInt(words[3]);
if (highest == null) {
highest = salary;
second = salary;
highEmp = record;
secondEmp = record;
}
else if (salary > highest) {
second = highest;
secondEmp = highEmp;
highest = salary;
highEmp = record;
}
else if (salary > second) {
second = salary;
secondEmp = record;
}
}
System.out.println("highest salary: " + highest);
String[] parts = highEmp.split(",");
System.out.println("Name: " + parts[0] + ", Age: " + parts[1] + ", Desig: " + parts[2]);
System.out.println("second highest salary: " + second);
parts = secondEmp.split(",");
System.out.println("Name: " + parts[0] + ", Age: " + parts[1] + ", Desig: " + parts[2]);