本文实例为大家分享了jfreechart动态画折线图的具体代码，供大家参考，具体内容如下
每隔一秒画一次，一分钟后重新画
需要的jar包是：gnujaxp.jar，jcommon-1.0.16.jar，jfreechart-1.0.13.jar
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public class jfreezhexiantest{
public static xyseries xycpuseries = new xyseries("cpu");
public static int hundroud = 0;
public static jfreechart jfreechart = null;
public jpanel getcpujfreechart(){
jfreechart = chartfactory.createxylinechart(
null, null, null, createdataset1(),
plotorientation.vertical, false, true, false);
standardcharttheme mcharttheme = new standardcharttheme("cn");
mcharttheme.setlargefont(new font("黑体", font.bold, 20));
mcharttheme.setextralargefont(new font("宋体", font.plain, 15));
mcharttheme.setregularfont(new font("宋体", font.plain, 15));
chartfactory.setcharttheme(mcharttheme);
jfreechart.setborderpaint(new color(0,204,205));
jfreechart.setbordervisible(true);
xyplot xyplot = (xyplot) jfreechart.getplot();
// y轴
numberaxis numberaxis = (numberaxis) xyplot.getrangeaxis();
numberaxis.setlowerbound(0);
numberaxis.setupperbound(100);
numberaxis.settickunit(new numbertickunit(100d));
// 只显示整数值
numberaxis.setstandardtickunits(numberaxis.createintegertickunits());
// numberaxis.setautorangeincludeszero(true);
numberaxis.setlowermargin(0); // 数据轴下（左）边距
numberaxis.setminortickmarksvisible(false);// 标记线是否显示
numberaxis.settickmarkinsidelength(0);// 外刻度线向内长度
numberaxis.settickmarkoutsidelength(0);
// x轴的设计
numberaxis x = (numberaxis) xyplot.getdomainaxis();
x.setautorange(true);// 自动设置数据轴数据范围
// 自己设置横坐标的值
x.setautotickunitselection(false);
x.settickunit(new numbertickunit(60d));
// 设置最大的显示值和最小的显示值
x.setlowerbound(0);
x.setupperbound(60);
// 数据轴的数据标签：只显示整数标签
x.setstandardtickunits(numberaxis.createintegertickunits());
x.setaxislinevisible(true);// x轴竖线是否显示
x.settickmarksvisible(false);// 标记线是否显示
rectangleinsets offset = new rectangleinsets(0, 0, 0, 0);
xyplot.setaxisoffset(offset);// 坐标轴到数据区的间距
xyplot.setbackgroundalpha(0.0f);// 去掉柱状图的背景色
xyplot.setoutlinepaint(null);// 去掉边框
// chartpanel chartpanel = new chartpanel(jfreechart);
// chartpanel.restoreautodomainbounds();//重置x轴
chartpanel chartpanel = new chartpanel(jfreechart, true);
return chartpanel;
}
/**
* 该方法是数据的设计
*
* @return
*/
public static xydataset createdataset1() {
xyseriescollection xyseriescollection = new xyseriescollection();
xyseriescollection.addseries(xycpuseries);
return xyseriescollection;
}
/**
* 随机生成的数据
*/
public static void dynamicrun() {
int i = 0;
while (true) {
double factor = math.random()*100;
hundroud = (int)factor;
jfreechart.settitle("cpu的大小是： "+hundroud+"%");
jfreechart.gettitle().setfont(new font("微软雅黑", 0, 16));//设置标题字体
xycpuseries.add(i, factor);
try {
thread.currentthread();
thread.sleep(1000);
} catch (interruptedexception e) {
e.printstacktrace();
}
i++;
if (i == 60){
i=0;
xycpuseries.delete(0, 59);
continue;
}
}
}
public static void main(string[] args) {
jfreezhexiantest jz = new jfreezhexiantest();
jframe frame = new jframe();
frame.setsize(700, 500);
frame.getcontentpane().add(jz.getcpujfreechart(), borderlayout.center);
frame.setvisible(true);
frame.setlocationrelativeto(null); // 窗口居于屏幕正*
frame.setdefaultcloseoperation(windowconstants.exit_on_close);
dynamicrun();
}
}
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/ygl19920119/article/details/78182598