datenlistmodel.java

JAVA图形界面算平均值 方差 简单的JTREE是应用

package gui;

import javax.swing.AbstractListModel;
import model.*;


public class DatenListModel extends AbstractListModel{
	/**
	 * 
	 */
	private static final long serialVersionUID = 7837150878713752600L;

	private Datenmodell daten;
	
	/** List of values that is displayed in the JList. */

	/**
	 * Listener for changes in the valuesList. When the underlying model changes,
	 * the JList is updated by forwarding the event.
	 */
	private ValueChangeListener valuesChangeListener = new ValueChangeListener() {
	
		public void valuesChanged(ValueEvent evt) {
			fireContentsChanged(DatenListModel.this, 0, getSize() - 1);
		}
		public void valuesAdded(ValueEvent evt) {
			fireContentsChanged(DatenListModel.this, 0, getSize() - 1);
		}
		public void valuesRemoved(ValueEvent evt) {
			fireContentsChanged(DatenListModel.this, 0, getSize() - 1);
		}
	};

	/**
	 * Creates a new list model for the given PointList.
	 * @param pointList
	 *    The model of points to display in the JList
	 */
	public DatenListModel(Datenmodell valueList) {
		this.daten = valueList;
		valueList.addValuesChangeListener(valuesChangeListener);
	}

	/*
	 * (non-Javadoc)
	 * @see javax.swing.ListModel#getSize()
	 */
	public int getSize() {
		return daten.getSize();
	}

	/* 
	 * (non-Javadoc)
	 * @see javax.swing.ListModel#getElementAt(int)
	 */
	public Object getElementAt(int index) {
		return daten.getValue(index);
	}
	
	
}