未处理的异常类型的Eclipse自动建议异常（Java/Weka）

Question

我想写一个脚本，可以在Weka中批处理多个ARFF文件。但是我总是得到“未处理的异常类型异常”错误。 Eclipse建议在每行代码中放置try-catch语句。

接受代码运行的建议后。但是，如果我这样做，这是非常不可接受的代码。任何机构的一个想法如何解决这个未处理的异常类型异常错误？

import java.io.BufferedReader; 
import java.io.FileNotFoundException; 
import java.io.FileReader; 
import java.io.IOException; 
import java.nio.file.Files; 
import java.nio.file.Paths; 
import weka.classifiers.Classifier; 
import weka.classifiers.Evaluation; 
import weka.classifiers.functions.LinearRegression; 
import weka.core.Instances; 
import weka.core.converters.ArffLoader.ArffReader; 
import weka.classifiers.trees.RandomForest; 


public class Eval{ 
    public static Instances LoadARFF(String location){ 
     BufferedReader reader = null; 
     try { 
      reader = new BufferedReader(new FileReader(location)); 
     } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     ArffReader arff = null; 
     try { 
      arff = new ArffReader(reader); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     return arff.getData(); 
    } 

    public static void main(String[] args) throws Exception {  
     //Get all files from training path 
     Files.walk(Paths.get("path/to/sets/Train")).forEach(filePath -> { 
      if (Files.isRegularFile(filePath)) { 
       System.out.println(filePath); 

       //Get the file name of the train set. 
       String fileLocation = filePath.normalize().toString(); 
       String[] tokens = fileLocation.split("[\\\\|/]"); 
       String filename = tokens[tokens.length - 1]; 
       System.out.println("Train file:" + filename + " found!"); 

       //Get both the train and test set 
       String TrainFile = "path/to/sets/Train/"+ filename; 
       String TestFile = "path/to/sets/Test/"+ filename; 

       //Load the train set 
       Instances train = LoadARFF(TrainFile); 
       train.setClassIndex(train.numAttributes() - 1); 

       //Load the test set. 
       Instances test = LoadARFF(TestFile); 
       test.setClassIndex(train.numAttributes() - 1); 

       //train classifier 
       Classifier cls = new RandomForest(); 
       cls.buildClassifier(train); 

       // evaluate classifier and print some statistics 
       Evaluation eval = null; 
       eval = new Evaluation(train); 
       eval.evaluateModel(cls, test); 
       System.out.println(cls); 
       System.out.println(eval.toSummaryString("\nResults\n======\n", false)); 
      } //if 
     });//for each 
    }//Main 
}//class 

错误代码如下：

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    Unhandled exception type Exception 
    Unhandled exception type Exception 
    Unhandled exception type Exception 

    at Eval.main(Eval.java:60) 

接受Eclipse的自动建议后，代码为约两倍大的接受了。

Answer 1

我会做这样的事情......

private static void processFile(Path filePath) { 
    System.out.println(filePath); 

    //Get the file name of the train set. 
    String fileLocation = filePath.normalize().toString(); 
    String[] tokens = fileLocation.split("[\\\\|/]"); 
    String filename = tokens[tokens.length - 1]; 
    System.out.println("Train file:" + filename + " found!"); 

    //Get both the train and test set 
    String TrainFile = "path/to/sets/Train/"+ filename; 
    String TestFile = "path/to/sets/Test/"+ filename; 

    //Load the train set 
    Instances train = LoadARFF(TrainFile); 
    train.setClassIndex(train.numAttributes() - 1); 

    //Load the test set. 
    Instances test = LoadARFF(TestFile); 
    test.setClassIndex(train.numAttributes() - 1); 

    //train classifier 
    Classifier cls = new RandomForest(); 
    cls.buildClassifier(train); 

    // evaluate classifier and print some statistics 
    Evaluation eval = null; 
    eval = new Evaluation(train); 
    eval.evaluateModel(cls, test); 
    System.out.println(cls); 
    System.out.println(eval.toSummaryString("\nResults\n======\n", false)); 
} 

private static void processPath(Path path) { 
    if(Files.isRegularFile(path)) { 
     try { 
      processFile(path); 
     } catch (Exception ex) { 
      throw new RuntimeException(ex); 
     } 
    } 
} 

public static void main(String[] args) throws Exception {  
    //Get all files from training path 
    Files.walk(Paths.get("path/to/sets/Train")).forEach(Eval::processPath); 
}//Main 

Answer 2

从main删除

throws Exception 

。你为什么添加？！？