import sun.jvm.hotspot.oops.ObjectHistogramElement; //导入依赖的package包/类
public Object getValueForColumn(Object obj, int col) {
    ObjectHistogramElement el = (ObjectHistogramElement)obj;
    switch (col) {
    case 0:
        return new Long(el.getSize());
    case 1:
        return new Long(el.getCount());
    case 2:
        return el.getDescription();
    default:
        throw new RuntimeException("Index (" + col + ") out of bounds");
    }
}
 

import sun.jvm.hotspot.oops.ObjectHistogramElement; //导入依赖的package包/类
private void fireShowObjectsOfType() {
    int i = table.getSelectedRow();
    if (i < 0) {
        return;
    }

    ObjectHistogramElement el = dataModel.getElement(i);

    for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
        Listener listener = (Listener) iter.next();
        listener.showObjectsOfType(el.getKlass());
    }
}
 

import sun.jvm.hotspot.oops.ObjectHistogramElement; //导入依赖的package包/类
public ObjectHistogramElement getElement(int index) {
    return (ObjectHistogramElement) elements.get(index);
}