weka java api stringtovector异常
我有一段代码使用了Weka的Java API:weka java api stringtovector异常,java,api,exception,machine-learning,weka,Java,Api,Exception,Machine Learning,Weka,我有一段代码使用了Weka的Java API: String html = "blaaah"; Attribute input = new Attribute("html",(FastVector) null); FastVector inputVec = new FastVector(); inputVec.addElement(input); Instances htmlInst = new Instances("html",inputVec,1);
String html = "blaaah";
Attribute input = new Attribute("html",(FastVector) null);
FastVector inputVec = new FastVector();
inputVec.addElement(input);
Instances htmlInst = new Instances("html",inputVec,1);
htmlInst.add(new Instance(1));
htmlInst.instance(0).setValue(0, html);
System.out.println(htmlInst);
StringToWordVector filter = new StringToWordVector();
filter.setInputFormat(htmlInst);
Instances dataFiltered = Filter.useFilter(htmlInst, filter);
但是在filter.setInputFormat(htmlInst)行中,Java抱怨函数抛出未处理的异常
我做错了什么?如果出现任何问题,您必须使用try-catch块:
try {
filter.setInputFormat(htmlInst);
Instances dataFiltered = Filter.useFilter(htmlInst, filter);
} catch (Exception e) {
e.printStackTrace();
}
当函数显式抛出异常时,必须发生以下两种情况之一
异常。不是超描述性的,但需要适当处理
您可以这样做:
try {
StringToWordVector filter = new StringToWordVector();
filter.setInputFormat(htmlInst);
Instances dataFiltered = Filter.useFilter(htmlInst, filter);
} catch (Exception e) {
System.err.println("Exception caught during formatting: " + e.getMessage());
return;
}
如果希望让另一个函数处理异常,请更改方法签名以显式引发异常:
private Object formatMyString(String s) throws Exception {
...
}