How can I Sort Wrapper list in Salesforce?

Hi Pranav,

Here is the code for sorting the wrapper list:-

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);
}
}
}

Adding some points and code snippet:

37down vote
Apex provides a sort method on the List class for sorting. For objects such as this however, you must implement the Comparable interface. Note the Salesforce doc samples indicate you need to make your class 'global' scope, this is no longer true.

public class jobsWrapper implements Comparable
{
public Integer compareTo(Object compareTo)
{
jobsWrapper jobsWrapper = (jobsWrapper) compareTo;
if (job.Name == jobsWrapper.job.Name) return 0;
if (job.Name > jobsWrapper.job.Name) return 1;
return -1;
}
}
Then once you put your objects into a list you can use the sort method.

List<jobsWrapper> jobs = new List<jobsWrapper>();
// Add things to the list ...
jobs.sort();

Thanks