Carry out the following steps to develop an Apex Controller, which is used as part of the account search mechanism, using the Salesforce Developer Console:

1. Click on the Setup gear icon, as shown in the following screenshot:

The Setup gear icon is located in the top right-hand area of the main home page.

2. Click the Developer Console option, as shown in the following screenshot:

3. In the resulting Developer Console window, click on File.
4. Click on New.
5. Click on Apex Class, as shown in the following screenshot:

6. In the resulting New Apex class dialog, enter AccountSearchController in the Please enter a name for your new Apex class textbox.
7. Click on OK, as shown in the following screenshot:

8. In the resulting Apex class edit page, paste the following code:

public without sharing class AccountSearchController { 
   @AuraEnabled 
    public static List<Account> getAccounts(String psSearchText
 { 
      String sSearchName = '%' + psSearchText + '%'; 
      List<Account> accounts = [ 
         SELECT Id, Name, Type, Industry, Description, Phone  
         FROM Account  
         WHERE Name LIKE :sSearchName ]; 
      return accounts;     
   }   
} 
 

9. Click on File.
10. Click on Save, as shown in the following screenshot: