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java - 如何在 JFreeCharts 中编写绘图点之间的时间延迟?

转载 作者:行者123 更新时间:2023-12-01 16:04:28 25 4
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有没有办法使用 JFreeCharts 为 xy 线图表的绘制过程设置动画?我希望能够观看程序绘制每个线段并将它们连接起来。

例如,如果我将其粘贴到 TextArea 中,“gtgtaaacaatatatggcg”,我想观看它逐一绘制每个线段的图形。

提前致谢! :)

我的代码如下:

import java.util.Scanner;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import org.jfree.chart.*;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.xy.*;

public class RandomWalkComplete extends Applet implements ActionListener
{
Panel panel;
TextArea textarea, outputArea;
Button move,exit;
String thetext;
Scanner reader = new Scanner(System.in);
String thetext2;
Label instructions;

int x,y;

public void init()
{
setSize(500,250); //set size of applet

instructions=new Label("Paste the gene sequences in the " +
"text field and press the graph button.");
add(instructions);

panel = new Panel();
add(panel);
setVisible(true);
textarea= new TextArea(10,20);
add(textarea);

move=new Button("Graph");
move.addActionListener(this);
add(move);

exit=new Button("Exit");
exit.addActionListener(this);
add(exit);
}

public void actionPerformed(ActionEvent e)
{
XYSeries series = new XYSeries("DNA Walk",false,true);

x= 0; y = 0;
series.add(x,y);

if(e.getSource() == move)
{
thetext=textarea.getText(); //the text is the DNA bases pasted
thetext=thetext.replaceAll(" ",""); //removes spaces
thetext2 = "";

for(int i=0; i<thetext.length(); i++)
{
char a = thetext.charAt(i);

switch (a)
{
case 'A': case 'a'://moves right
x+=1; y+=0;
series.add(x,y);
break;

case 'C': case 'c': //moves up
x+=0; y+=1;
series.add(x,y);
break;

case 'G': case 'g': //move left
x-=1; y+=0;
series.add(x,y);
break;

case 'T': case 't'://move down
x+=0; y-=1;
series.add(x,y);
break;

default: // series.add(0,0);
break;
}
}
XYDataset xyDataset = new XYSeriesCollection(series);
JFreeChart chart = ChartFactory.createXYLineChart("DNA Random Walk",
"", "", xyDataset, PlotOrientation.VERTICAL, true, true, false);
ChartFrame frame1=new ChartFrame("DNA Random Walk",chart);
frame1.setVisible(true);
frame1.setSize(300,300);
}
if(e.getSource()==exit)
{System.exit(0);}
}
public void stop(){}
}

最佳答案

javax.swing.Timer 的实例对此效果很好,如 How to Use Swing Timers 中所述。 .

附录:正如 @David Sauter 所观察到的, java.util.TimerscheduleAtFixedRate() 方法将是一个合适的替代方案。文章Using Timers in Swing Applications比较这两种方法。

关于java - 如何在 JFreeCharts 中编写绘图点之间的时间延迟?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2923934/

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