Test - Collections
Last updated
Last updated
public class Employee {
private int id;
private String name;
private double salary;
public Employee(int id, String name, double salary) {
this.id = id;
this.name = name;
this.salary = salary;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
}import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class Test1 {
public static void main(String[] args) {
Employee emp1 = new Employee(1, "Mohit", 423443);
Employee emp2 = new Employee(2, "Rahul", 4335656);
Employee emp3 = new Employee(3, "Shyam", 45443);
Employee emp4 = new Employee(4, "Mohit", 878788);
Employee emp5 = new Employee(5, "Swaraj", 767755);
Employee emp6 = new Employee(3, "Shyam", 45443);
Employee emp7 = new Employee(7, "Anish", 35546);
List<Employee> empList = new ArrayList<>(10);
empList.add(emp1);
empList.add(emp2);
empList.add(emp3);
empList.add(emp4);
empList.add(emp5);
empList.add(emp6);
empList.add(emp7);
displayEmployeesBySimpleForLoop(empList);
displayEmployeesByForEach(empList);
displayEmployeesByIterator(empList);
List<Employee> sortedEmpList = sortEmpByNameAndSalary(empList);
List<Employee> sortedEmpList1 = sortEmpByName(empList);
List<Employee> sortedEmpList2 = sortEmpBySalary(empList);
int empId = 6;
Employee empRemoved = removeById(empList, empId);
HashMap<String, Employee> empMap = convertListToMap(empList);
displayEmpMap(empMap);
String nameOfTheEmp = "Mohit";
removeByNameFromMap(empMap, nameOfTheEmp);
List<Employee> empListWithoutDuplicate = removeDuplicateEntriesFromList(empList);
}
/**
* Use simple for loop
*
* for(int i =0 ; i<size; i++){
*
* }
*
* @param empList
*/
private static void displayEmployeesBySimpleForLoop(List<Employee> empList) {
}
/**
* Use For each loop for(Double obj : list){
*
* }
*
* @param empList
*/
private static void displayEmployeesByForEach(List<Employee> empList) {
}
/**
* Use iterator Iterator iterator = list.iterator();
*
* @param empList
*/
private static void displayEmployeesByIterator(List<Employee> empList) {
}
/**
* This method will return a sorted list of employees based name and is name are
* then by salary
*
* @param empList
* @return
*/
private static List<Employee> sortEmpByNameAndSalary(List<Employee> empList) {
return null;
}
/**
* Use comparator
*
* @param empList
* @return
*/
private static List<Employee> sortEmpBySalary(List<Employee> empList) {
return null;
}
/**
* Use comparator
*
* @param empList
* @return
*/
private static List<Employee> sortEmpByName(List<Employee> empList) {
return null;
}
/**
* This will remove and return the removed element based on id
*
* @param empList
*
* @param empId
* @return
*/
private static Employee removeById(List<Employee> empList, int empId) {
return null;
}
/**
* Create a map using the list, assign keys as names of the employee and value
* as the employee object
*
* @param empList
* @return
*/
private static HashMap<String, Employee> convertListToMap(List<Employee> empList) {
return null;
}
/**
*
* Iterate the whole map and print botth keys and values
*
* @param empMap
*/
private static void displayEmpMap(HashMap<String, Employee> empMap) {
}
/**
* Remove all the entries from the map where emp name is "Mohit"
*
* @param empMap
* @param nameOfTheEmp
*/
private static void removeByNameFromMap(HashMap<String, Employee> empMap, String nameOfTheEmp) {
}
/**
* Remove all the duplicate entries from the list and return the list .
*
* @param empList
* @return
*/
private static List<Employee> removeDuplicateEntriesFromList(List<Employee> empList) {
return null;
}
}
