老师请问这道题能不能输出工资的最大值

我想在排序以后，输出工资的最大值例如输出  double max = 25000; 请问如何做到？

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class EmployeeTest{

    public static void main(String[] args){

        Employee e1 = new Employee("e001", "zhang", 18000);

Employee e2 = new Employee("e002", "li", 25000);

Employee e3 = new Employee("e003", "wang", 16000);

List <Employee>l = new ArrayList<Employee>();

l.add(e1);

l.add(e2);

l.add(e3);

System.out.println("befor");

for(Employee n:l) {

System.out.println(n);

}

Collections.sort(l);

System.out.println("after");

for(Employee n:l) {

System.out.println(n);

}

    }}

//实现Comparable接口

public class Employee implements Comparable<Employee>{

private String id;

private String name;

private double salar;

public Employee(String id, String name, double salar) {

super();

this.id = id;

this.name = name;

this.salar = salar;

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public double getSalar() {

return salar;

}

public void setSalar(double salar) {

this.salar = salar;

}

@Override

public String toString() {

return "Employee [id=" + id + ", name=" + name + ", salar=" + salar + "]";

}

@Override

public int compareTo(Employee o) {

// 工资降序

double salar1 = this.getSalar();

double salar2 = o.getSalar();

int n = new Double(salar2 - salar1).intValue();

return n;

}

}