animator.java

JFreeChart开发全攻略,JFreeChart开发全攻略

package bar;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 * 动画类.
 */
public class Animator extends Timer implements ActionListener {

	private static final long serialVersionUID = 1L;
	
	private DefaultCategoryDataset dataset;

	/**
	 * 构造函数.
	 */
	public Animator(DefaultCategoryDataset defaultcategorydataset) {
		super(40, null);
		dataset = defaultcategorydataset;
		addActionListener(this);
	}

	public void actionPerformed(ActionEvent actionevent) {
		int i = (int) (Math.random() * (double) dataset.getRowCount());
		Comparable comparable = dataset.getRowKey(i);
		int j = (int) (Math.random() * (double) dataset.getColumnCount());
		Comparable comparable1 = dataset.getColumnKey(j);
		int k = Math.random() - 0.5D >= 0.0D ? 5 : -5;
		dataset.setValue(Math.max(0.0D, dataset.getValue(i, j).doubleValue()
				+ (double) k), comparable, comparable1);
	}
}