Compare column of csv in java - sorting

Question

I'm reading a csv file with my 'CsvReader' like this:
public class CsvReader {
public static void main(String[] args) {
Map<String,Employee> empl = new HashMap <String,Employee>();
String csvFile= "C:/Users/rapurohi/Desktop/employee.csv";
BufferedReader br=null;
String line= "";
String csvSplitBy=",";
try{
br=new BufferedReader(new FileReader(csvFile));
while ((line =br.readLine())!=null){
String [] employee=line.split(csvSplitBy);
Employee e=new Employee(employee[0], employee[1], employee[2]);
empl.put((employee[0]),e);
System.out.println("Employee[id="+employee[0]+"name="+employee[1]+"salary="+employee[2]+"]" );
}
}catch (FileNotFoundException|IOException e){
e.printStackTrace();
}
}finally{
if(br!=null){
try{
br.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
}
}
The csv i'm using looks like this:
empid,name,salary
"456","John","4000"
"457","James","5000"
"458","Jack","3000"
"459","Jenny","6000"
The dataVO for employee looks like
package com.cg.dto;
public class Employee {
String empId;
String empName;
String empSalary;
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 String getEmpSalary() {
return empSalary;
}
public void setEmpSalary(String empSalary) {
this.empSalary = empSalary;
}
public Employee(String empId, String empName, String empSalary) {
super();
this.empId = empId;
this.empName = empName;
this.empSalary = empSalary;
}
I need to find the maximum salary and write the entry in a Csv file as output.

Answer 1

Assuming you only need help with finding the maximum salary, here's a quick example:
int maxSal = 0;
Employee highestPayedEmployee = null;
for (Employee employee : empl.values()) {
if(employee.getSalary() > maxSal){
maxSal = employee.getSalary();
highestPayedEmployee = employee;
}
}
This assumes that your Employee class has a getSalary() method that returns the salary as a number.
If needed you can convert a string to a number with:
Integer.parseInt(salaryString);