Exception in thread "main" java.lang.NoSuchMethodError: calculateSecurityWarningPosition

最新推荐文章于 2023-10-18 11:37:46 发布

置顶 zkui125

最新推荐文章于 2023-10-18 11:37:46 发布

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分类专栏： java 文章标签： exception thread dataset jfreechart import string

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本文深入分析了一段Java代码中遇到的NoSuchMethodError异常的原因，并提供了详细的解决步骤。通过代码实例，解释了如何定位和修复此类异常，帮助开发者避免常见错误。

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Exception in thread "main" java.lang.NoSuchMethodError: calculateSecurityWarningPosition
	at java.awt.Window.initIDs(Native Method)
	at java.awt.Window.<clinit>(Window.java:286)
	at sun.misc.Unsafe.ensureClassInitialized(Native Method)
	at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:25)
	at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
	at java.lang.reflect.Field.acquireFieldAccessor(Field.java:918)
	at java.lang.reflect.Field.getFieldAccessor(Field.java:899)
	at java.lang.reflect.Field.get(Field.java:358)
	at sun.awt.SunToolkit$6.run(SunToolkit.java:1315)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.awt.SunToolkit.<clinit>(SunToolkit.java:1309)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:169)
	at java.awt.Toolkit$2.run(Toolkit.java:834)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:826)
	at javax.swing.UIManager.<clinit>(UIManager.java:388)
	at org.jfree.chart.JFreeChart.<clinit>(JFreeChart.java:250)
	at org.jfree.chart.ChartFactory.createBarChart(ChartFactory.java:622)
	at cn.com.bi.util.JfreeChartUtil.NoteChart(JfreeChartUtil.java:21)
	at cn.com.bi.util.JfreeChartUtil.main(JfreeChartUtil.java:49)

这段代码哪错了

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
public class JfreeChartUtil  {
/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

   public static void NoteChart(){
	CategoryDataset dataset =getDataset();
			JFreeChart chart  =	ChartFactory.createBarChart("即时在线","时间", "人数", dataset,PlotOrientation.HORIZONTAL, false, false, false);
//			JFreeChart chart = ChartFactory.createBarChart3D
//			("即时在线", "时间", "人数", dataset, PlotOrientation.VERTICAL, true, true, true);
			FileOutputStream foStream=null;
			try {
				foStream= new FileOutputStream("d://ssf.jpg");
					ChartUtilities.writeChartAsJPEG(foStream,100, chart, 400, 300);
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}finally{
				try {
					foStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
	}
	public static CategoryDataset getDataset(){
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		dataset.addValue(100, "时间间隔", "周一");
		dataset.addValue(100, "时间间隔", "周二");
		dataset.addValue(100, "时间间隔", "周三");
		dataset.addValue(100, "时间间隔","周四");
		return dataset;
	}
	public static void main(String[] args) {
		NoteChart();
	}
		
}