1. A method for classifying a plurality of objects displayed on a display device and displaying the classified plurality of objects, the method comprising: selecting, by one or more processors, one object from a plurality of objects displayed on a display device as a selected object, wherein said selecting is performed in response to a user performing an object selection operation, and classifying, by one or more processors, the plurality of objects, wherein classification of each of the plurality of objects is based on a degree of association with the selected object, and wherein said classifying the plurality of objects comprises: reading, by one or more processors, a feature setting for computation of the degree of association; specifying, by one or more processors, a plurality of features that are subject to the computation of the degree of association, wherein the plurality of features includes a creation date and time of an object, a display attribute of the object, an area of the object, a type of the object, and a distance of the object from the selected object; computing, by one or more processors and for each of the plurality of objects, the degree of association based on a difference in feature value from the selected object with regard to the plurality of features; and dividing, by one or more processors, the plurality of objects into a plurality of groups, wherein each group from the plurality of groups is based on the degree of association; weighting, by one or more processors, each of the plurality of features; and displaying, by one or more processors, each of the plurality of groups at a different position on the display device according to the degree of association of the selected object to the plurality of objects based on weightings of the plurality of features.