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srinu jsrinu j 

Which interface is used to sort wrapper class column?

Which interface is used to sort wrapper class column?
salesforce mesalesforce me
There are some ways to sort the list of Sobject.

 

1. You can make a query using the order by  keyword and assign the result to the list

 

              - If the list is formed already, then you can take the record Ids from that list into a set and in the query mention "where Id                                                     IN : set AND order by Name/..."  

              

2. you can add the records into a map. The map should be like : key as the Field (on which field basis you want to sort) and the value is SObject

           

            - Now the map is formed and the keyset of the map can be  sorted . When keys are sorted obviously the values also will get sorted.

 

            - Now take the map values into a list.
srinu jsrinu j
Thanks for reply.  I know that answer. But I want to know ' Is there any interfaces to sort column of the wrapper class?'
salesforce mesalesforce me
if u ok.   Press Like 
Pradnya BPradnya B
Comparable Interface.
Amit Chaudhary 8Amit Chaudhary 8
Option 1:- Order by
https://developer.salesforce.com/docs/atlas.en-us.soql_sosl.meta/soql_sosl/sforce_api_calls_soql_select_orderby.htm

Option 2:- How to Sort Wrapper class Collection in Apex
http://www.jitendrazaa.com/blog/salesforce/how-to-sort-wrapper-class-collection-in-apex/ 
global class Book implements Comparable {

	public String BookTitle ;
	public String Author ;
	public Integer TotalPages ;
	public Double Price ;
	public Date publishingDate;

	public enum SORT_BY {
		ByTitle,ByPage
		}

	//Variable to decide the member on which sorting should be performed
	public static SORT_BY sortBy = SORT_BY.ByTitle;

	public Book(String bt, String a, Integer tp, Double p, Date pd)
	{
		BookTitle = bt;
		Author = a;
		TotalPages = tp;
		Price = p;
		publishingDate = pd;
	}

	global Integer compareTo(Object objToCompare) {
		//Sort by BookName Alphabetically
		if(sortBy == SORT_BY.ByTitle)
		{
			return BookTitle.compareTo(((Book)objToCompare).BookTitle);
		}
		else //Sort by Book price
		{
			return Integer.valueOf(Price - ((Book)objToCompare).Price);
		}
	}
}
Book[] books = new Book[]{
	new Book('Salesforce Handbook','Jeff Douglas',360,35,Date.newInstance(2011, 03, 20)),
	new Book('Let Us C','Yashavant P. Kanetkar',593,58,Date.newInstance(2008, 03, 21)),
	new Book('Head First Design Patterns ','Elisabeth Freeman',678,28,Date.newInstance(2004, 11,01))
};

Book.sortBy = Book.SORT_BY.ByTitle;
books.sort();
System.debug(books);

Book.sortBy = Book.SORT_BY.ByPrice;
books.sort();
System.debug(books);
Please let us know if this will help u

Thanks
\Amit Chaudhary