我在这里有一堆Java代码行，在尝试执行此操作时抛出索引outofbounds异常
System.out.println(data3) //during the loop that fills the object
如果您// - 注释data3的sysout并使用
直接访问数据的System.out.println（data3.instance（6）.classValue（））;
您看到Instances对象已完全填满，一切正常。为什么我会收到错误
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
at weka.core.FastVector.elementAt(FastVector.java:254)
at weka.core.Attribute.value(Attribute.java:692)
at weka.core.Instance.stringValue(Instance.java:846)
at weka.core.Instance.stringValue(Instance.java:822)
at weka.core.Instance.toString(Instance.java:942)
at weka.core.Instance.toString(Instance.java:883)
at java.lang.String.valueOf(Unknown Source)
at java.lang.StringBuffer.append(Unknown Source)
at weka.core.Instances.stringWithoutHeader(Instances.java:1376)
at weka.core.Instances.toString(Instances.java:1360)
at org.tuhh.cpmgg.weka.AudioClassifier.main(AudioClassifier.java:143)
这是我的代码（你需要jaudio 1.0.4和weka 3.8和JRE 1.7）
package org.tuhh.cpmgg.weka;
import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Pattern;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import a.main.JAudioLaunch;
import jAudioFeatureExtractor.ACE.DataTypes.Batch;
import jAudioFeatureExtractor.DataTypes.RecordingInfo;
import jAudioFeatureExtractor.jAudioTools.AudioSamples;
import weka.core.*;
public class AudioClassifier {
public static File[] listFilesMatching(File root, String regex) {
if(!root.isDirectory()) {
throw new IllegalArgumentException(root+" is no directory.");
}
final Pattern p = Pattern.compile(regex);
return root.listFiles(new FileFilter(){
// @Override
public boolean accept(File file) {
return p.matcher(file.getName()).matches();
}
});
}
public static void main (String[] args){
int z = 0;
try {
File[] definers = listFilesMatching(new File("src\\main\\java\\org\\tuhh\\cpmgg\\weka\\"), "^f.*.xml");
System.out.println(definers[7].getName());
JAXBContext jaxbContext = JAXBContext.newInstance(FeatureVectorFile.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
FastVector atts = new FastVector(8);
// Create Nominal Attribute for Genres
FastVector genres = new FastVector();
genres.addElement("Jazz");
genres.addElement("Country");
genres.addElement("Rock");
genres.addElement("Hiphop");
genres.addElement("Ska");
genres.addElement("Other");
genres.addElement("Blues");
genres.addElement("Randb");
genres.addElement("Pop");
genres.addElement("Electronic");
//Create Feature Attributes
atts.addElement(new Attribute("Spectral Flux Overall Standard Deviation"));
atts.addElement(new Attribute("Root Mean Square Overall Standard Deviation"));
atts.addElement(new Attribute("Beat Sum Overall Standard Deviation"));
atts.addElement(new Attribute("Method of Moments Overall Standard Deviation"));
atts.addElement(new Attribute("Spectral Flux Overall Average"));
atts.addElement(new Attribute("Root Mean Square Overall Average"));
atts.addElement(new Attribute("Beat Sum Overall Average"));
atts.addElement(new Attribute("Method of Moments Overall Average"));
atts.addElement(new Attribute("Genre ",genres));
Instances data3 = new Instances("GenreDefiners", atts, 0);
data3.setClassIndex(data3.numAttributes()-1);
System.out.println("ZIP " + data3);
for(File itfile:definers){
System.out.println("ITERATION " + z);
FeatureVectorFile featuress = (FeatureVectorFile) jaxbUnmarshaller.unmarshal(itfile);
List<Feature> fvalss = featuress.dataset.getFeatures();
//Read Attribute/Feature Values from parsed xml
double[] vals = new double[data3.numAttributes()];
int y=0;
for(Feature d:fvalss) {
vals[y] = Double.parseDouble(d.values.get(0));
y=y+1;
}
String currentclass = itfile.getName().replaceAll("[^A-Z]", "");
switch (currentclass) {
case "JAZZ":
vals[8] = 1.0;
data3.add(new Instance(1.0,vals));
break;
case "COUNTRY":
vals[8] = 2.0;
data3.add(new Instance(1.0,vals));
break;
case "ROCK":
vals[8] = 3.0;
data3.add(new Instance(1.0,vals));
break;
case "HIPHOP":
vals[8] = 4.0;
data3.add(new Instance(1.0,vals));
break;
case "SKA":
vals[8] = 5.0;
data3.add(new Instance(1.0,vals));
break;
case "OTHER":
vals[8] = 6.0;
data3.add(new Instance(1.0,vals));
break;
case "BLUES":
vals[8] = 7.0;
data3.add(new Instance(1.0,vals));
break;
case "RANDB":
vals[8] = 8.0;
data3.add(new Instance(1.0,vals));
break;
case "POP":
vals[8] = 9.0;
//System.out.println(z);
//System.out.println(itfile.getName());
data3.add(new Instance(1.0,vals));
//System.out.println(data3.instance(z).classValue());
break;
case "ELECTRONIC":
vals[8] = 10.0;
data3.add(new Instance(1.0,vals));
break;
}
//data3.add(new Instance(1.0,vals));
/*System.out.println("# Attrs");
System.out.println(data3.numAttributes());
System.out.println("# Classes");
System.out.println(data3.numClasses());
System.out.println("Classvalue");
System.out.println(data3.instance(z).classValue());*/
z=z+1;
}
System.out.println(data3.instance(6).classValue());
System.out.println(data3.toString()); //THIS FAILS... but only during 2nd iteration...
} catch (JAXBException e) {
e.printStackTrace();
}
}
@SuppressWarnings("unused")
private static File privjanalyse(File argum) {
/*
* Yijun: the input file is already in the test batch file to extract the corresponding features
* Todo: file as argument, no batch file use, feedback of featurevector
*/
File musicFile = new File(argum.getAbsolutePath());
JAudioLaunch launch = new JAudioLaunch(musicFile);
String [] string = new String[2];
string[0] = "-b";
string[1] = "C:\\Users\\ce993\\Dropbox\\Project Laborotary\\jAudio\\batch"; // src/main/resources/JAudio
// JAudioCommandLine.execute(string);
File featurefile = new File("C:\\Users\\ce993\\Dropbox\\Project Laborotary\\jAudio\\feature_values_current.xml");
return featurefile;
}
}