Store a list of objects

**Miles Runner** · 11-02-2010

Hello,
I have a list of objects of type myClass

List list = <myClasse> new ArrayList <myClasse>();

The objects of type myClass have different fields of which one of them is total. I would like to sort this list to be first in the list, the object which the total field is greatest. Shortly, I want to store a list of objects. Does any one has an idea about it. If you have one then please do post back. Thank you in advance

**Windowed** · 11-02-2010

Hello,
Do you implement the interface "Similar" to your subject, and you defined in your method "compareTo" field is used to compare (and sort). This simple operation enables you to use sorting methods currently implemented in Java (SortedList, etc ...) This is the most simple and clean. Then, you can also rewrite by hand sorting method of your objects.

**New ID** · 11-02-2010

Hello,
I am trying the same code, but not successful. Here is the code

Code:

Public int compares(In o1, o2 Account) {
		Double d1 = o1.getTotal();
		Double d2 = o2.getTotal();
		
		if (d1> d2) {
			return -1;
		} else if (d1 == d2) {
			return 0;
		} else {
			return 1;
		}
	}

When I want to sort, i get

Code:

Collections.fate(listCompte)

If you have a solution for this then please let me know.

**Miles Runner** · 11-02-2010

Hello,
Actually I just noticed that it belongs to the package

Code:

java.lang

And not the

Code:

non-java.util

If you have any other alternative for doing the same that is performing the same task then please help me. Thanks in advance.

**NetWorkInG** · 11-02-2010

Hi,
But you can also use a ComparatorThis can be very handy when you want to change the type of comparison. To do this simply use the method sort () appropriate:

Code:

Collections.fate(listCompte, tonComparator);

Just try using the following code and see if it works for you. If not then post back with the query you have.

**Miles Runner** · 11-02-2010

Hello,
I do not know how to use comparator. By implementing java.util.Comparator, I also have the method compare (Object o1, Object o2). In my case, I implement java.lang.Comparable and I compareTo ()

Code:

Public int compareTo(Account No.) {
		Double d1 = o.getTotal();
	    Double d2 = this.getTotal(); 
	    if (d1> d2) {
	    	return -1; 
	    } else if (d1 == d2) {
	    	return 0; 
	    } else {
	    	return 1; 
	    }
	}