[英]Edit method for Employee Store.(Using Hashmap)
嘿,誰能幫助我了解如何為我的公司應用程序執行編輯方法。 我以前曾尋求搜索方法的幫助。 而且我認為編輯方法可能涉及搜索方法。
這是我的代碼:
EmployeeStore.
//Imports.
import java.util.HashMap;
//********************************************************************
public class EmployeeStore
{
HashMap<String, Employee> map;
//Constructor.
public EmployeeStore()
{
map = new HashMap<String,Employee>();
}
//********************************************************************
//Hashmap Methods.
//Add to the Hashmap : Employee.
public void add(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
//********************************************************************
//Remove from the Hashmap : Employee.
public void remove(String key)
{
//Remove the Employee by name.
map.remove(key);
}
//********************************************************************
//Clear the Hashmap : Employee.
public void clear()
{
map.clear();
}
//********************************************************************
//Print the Hashmap : Employee.
public void print()
{
System.out.println("\n********Employee's in the Company.********");
for (Employee employee : map.values())
{
//System.out.println(employee); to print the toString of Employee class
//or:
System.out.println("Employee Name:\t" + employee.getEmployeeName());
System.out.println("Employee Id:\t" + employee.getEmployeeId());
System.out.println("E-mail:\t"+ employee.getEmployeeEmail());
}
}
public Employee get(String name){
return map.get(name);
}
/*public void searchByName ()
{
//(for(Employee e : map.values()) {...})
//and check for each employee if his/her email matches the searched value
for(Employee e : map.values())
{
System.out.println(e);
map.equals(getClass());
}
}*/
//********************************************************************
public Employee searchByName(String name)
{
Employee employee = map.get(name);
System.out.println(employee);
return employee;
}
//********************************************************************
public Employee searchByEmail(String email)
{
for (Employee employee : map.values())
{
if (email.equals(employee.getEmployeeEmail()))
{
System.out.println(employee);
return employee;
}
}
return null;
}
//********************************************************************
//********************************************************************
//********************************************************************
}
員工班。
//Imports:
//********************************************************************
//Employee Class.
public class Employee
{
//Variables.
private String employeeName;
private int employeeId;
private String employeeEmail;
//********************************************************************
//Constructor.
public Employee(String employeeName, int employeeId, String employeeEmail)
{
this.employeeName = employeeName;
this.employeeId = employeeId;
this.employeeEmail = employeeEmail;
}
//********************************************************************
//Getters.
public String getEmployeeEmail() {
return employeeEmail;
}
public void setEmployeeEmail(String employeeEmail) {
this.employeeEmail = employeeEmail;
}
public String getEmployeeName() {
return employeeName;
}
public int getEmployeeId() {
return employeeId;
}
//********************************************************************
//toString method.
public String toString() {
return "\t\t\tEmployee\n" +
"********************************************************************\n"+
"Employee Name: "+ employeeName +"\n"+
"Employee Id: " + employeeId +"\n"+
"Employee Email: " + employeeEmail;
}
//********************************************************************
}
您也可以為此使用Java的HashMap的put方法。 從HashMap的put方法的API中:
如果該映射先前包含此鍵的映射,則將替換舊值。
因此,類似:
public void edit(Employee employee)
{
map.put(employee.getEmployeeName(), employee);
}
然后在其他代碼中:
Employee employee = getEmployeeByName("Someniceemployeename");
if (employee != null)
{
employee.setEmployeeEmail("awesomeness@stackoverflow.com");
edit(employee);
}
關於編輯員工的ID,您需要采取一些其他預防措施。 首先,您要確保地圖包含您要編輯的ID(照常)。 其次,在“編輯” ID時,您需要首先從地圖上刪除舊員工實例(具有舊ID),然后使用put添加新員工。
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