此 Java 代码中的 NoClassDefFound 错误
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时间：2020-08-12 19:42:41 来源:igfitidea点击:
NoClassDefFound Error in this Java Code
提问by MUHAMMAD BILAL
I am facing an error in this code.
我在此代码中遇到错误。
import java.awt.Color;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
public void simplebarchart()
{
DefaultCategoryDataset dataset=new DefaultCategoryDataset() ;
dataset.setValue(80, "Marks", "Student1");
dataset.setValue(70, "Marks", "Student2");
dataset.setValue(65, "Marks", "Student3");
dataset.setValue(90, "Marks", "Student4");
JFreeChart c=ChartFactory.createBarChart("Student Score" ,"Student Name", "Marks",dataset,
PlotOrientation.VERTICAL, false, true, false);
CategoryPlot p=c.getCategoryPlot();
p.setRangeGridlinePaint(Color.BLACK);
ChartFrame frame=new ChartFrame("Bar Chart",c);
frame.setVisible(true);
frame.setSize(450, 350);
}
The error is given below
错误如下
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
org/jfree/util/PublicCloneable
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access0(URLClassLoader.java:71)
Why do I get this error?
为什么我会收到这个错误？
回答by Rawa
Do you have jcommon in your classpath?
你的类路径中有 jcommon 吗？
If not, simply add jCommon to your classpath and your problem should be solved.
如果没有，只需将 jCommon 添加到您的类路径中，您的问题就会得到解决。
Searches on the web suggests this answer frequently.
网络上的搜索经常建议这个答案。
