Question

 Odrer     ID    Descrption    Type 

Envelope  K205    Green       Paper     >>>>String Line with space in between
Box       J556    Yellow      Thermocol >>>>String Line with space in between
Envelope  L142    White       Plastic   >>>>String Line with space in between

I have a table something like above and I have to provide options sort the
data based on the column name, like “sort by Order”, “Sort By Type” something like that
plz suggest me the best ideas to achieve this in Java… The table rows are strings with
space separating each touple..

Answer 1

Represent each row in your table as an object with order, id, description and type attributes. Add each object to a collection such as a list. You can then create different comparators such as an OrderComparator and a TypeComparator to sort the collection based on order or type respectively.

For example, here is what your data class might look like:

public class Data{
    private final String order;
    private final String id;
    private final String description;
    private final String type;

    public Data(String order, String id, String description, String type) {
        this.order=order;
        this.id=id;
        this.description=description;
        this.type=type;
    }

    /** getter methods here **/
}

Now, you would add them to a list and use a specific comparator to sort it:

//add data to a list
List<Data> list = new ArrayList<Data>();
list.add(new Data("Envelope","K205","Green","Paper"));
list.add(new Data("Box","J556","Yellow","Thermocol"));
list.add(new Data("Envelope","L142","White","Plastic"));

//create a comparator to sort by type
Comparator<Data> typeComparator = new Comparator<Data>() {
    @Override
    public int compare(Data o1, Data o2) {
        return o1.getType().compareTo(o2.getType());
    }
};

//sort the list
Collections.sort(list, typeComparator);