我有以下非常简单的、故意出错的 java 类：
import java.io.InputStream;
import java.util.*;
public class ArrayListError{
public ArrayListError(){
}
public static void makeArray(int i){
ArrayList list = new ArrayList(i);
}
public static void main(String[] args)
{
System.out.println("Enter a number to create arrayList:");
Scanner scanner =new Scanner(System.in);
int i= scanner.nextInt();
makeArray(i);
}
}
在 evosuite cygwin( java -jar evosuite-20120511.jar -setup c:/Users/Eliezer\ Shindler/Desktop/myclasses) 上运行时，我得到：
de.unisb.cs.st.evosuite.setup.ScanProject.main(ScanProject.java:578) 的线程“主”java.lang.ExceptionInInitializerError 中的异常原因：com.thoughtworks.xstream.converters.ConversionException：无法构造de.unisb.cs.st.evosuite.callgraph.DistanceTransformer$ClassEntry 因为它没有无参数构造函数：无法构造 de.unisb.cs.st.evosuite.callg raph.DistanceTransformer$ClassEntry 因为它没有无参数构造函数----调试信息----消息：无法构造de.unisb.cs.st.evosuite.callgraph.Distanc eTransformer$ClassEntry，因为它没有无参数构造函数原因异常：com。 thinkworks.xstream.converters.reflection.ObjectAcces sException 原因消息：无法构造 de.unisb.cs.st.evosuite。callgraph.Distanc eTransformer$ClassEntry 因为它没有无参数构造函数类：java.util.HashSet 所需类型：de.unisb.cs.st.evosuite.callgraph.DistanceTransformer$Clas sEntry 路径：/set/de. unisb.cs.st.evosuite.callgraph.DistanceTransformer $ClassEntry
行号：2
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall er.java:89)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(A bstractReferenceUnmarshaller.java:63)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm arshaller.java:76)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm arshaller.java:60)
at com.thoughtworks.xstream.converters.collections.AbstractCollectionCon verter.readItem(AbstractCollectionConverter.java:71)
at com.thoughtworks.xstream.converters.collections.CollectionConverter.p opulateCollection(CollectionConverter.java:68)
at com.thoughtworks.xstream.converters.collections.CollectionConverter.u nmarshal(CollectionConverter.java:61)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall er.java:82)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(A bstractReferenceUnmarshaller.java:63)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm arshaller.java:76)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm arshaller.java:60)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller .java:137)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarsh al(AbstractTreeMarshallingStrategy.java:33)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:923)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:909)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853)
at de.unisb.cs.st.evosuite.utils.Utils.readXML(Utils.java:301)
at de.unisb.cs.st.evosuite.callgraph.Hierarchy.readFromDefaultLocation(H ierarchy.java:113)
at de.unisb.cs.st.evosuite.setup.TestTaskGenerator.<clinit>(TestTaskGene rator.java:57)
... 1 more
原因：com.thoughtworks.xstream.converters.reflection.ObjectAccessException：无法构造 de.unisb.cs.st.evosuite.callgraph.DistanceTransformer$ClassEnt ry，因为它在 com.thoughtworks.xstream 中没有无参数构造函数。 converters.reflection.PureJavaReflectionProvider.newInstance(PureJavaReflectionProvider.java:71) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv erter.instantiateNewInstance(AbstractReflectionConverter.java:308) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv erter .unmarshal(AbstractReflectionConverter.java:161) 在 com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall er.java:82) ... 19 更多
我不明白这一点 - 任何人都可以帮忙 - 我多年来一直在努力解决这个问题。evosuite 文档可在 www.evosuite.org/documentation 获得