Display a Multi-picklist as Checkboxes

Assume Military_Branches__c is of multipicklist type but you want to display it as check boxes on VF page.

Task1: created a VF page and write following codes between pageblocksection.

Task 2: create a method in controller which will return the list of selectOptions

public List militaryBranch{get;set;}  //this will contain the values of selected checkboxes
public List getMilitaryBranches() {
          list options = new list(); 
          try {
              //Military_Branches__c is a multipicklist
              Schema.DescribeFieldResult fieldResult = Contact.Military_Branches__c.getDescribe(); 
              list values = fieldResult.getPickListValues();
              for (Schema.PicklistEntry a : values) {
                 options.add(new SelectOption(a.getLabel(), a.getValue()));
              }
          }  catch (Exception e) {
            ApexPages.addMessages(e);
          }
          return options;
}