try{
    // The code that can throw an exception
} catch(Exception e){
    e.printStackTrace(); // handle the exception somehow
}

import java.io.*;
 
public class Test{
    
    public Test(){
        
    }
    
    public static void main (String[] args){
        Test test = new Test();
        test.readFile("test.txt");
    }
    
    
    public String readFile(String fileName){
        String fileText = "";
        try{
            String lineRead = "";
            File file = new File(fileName);
            FileReader fr = new FileReader(file); 
            BufferedReader br = new BufferedReader(fr);
            while ((lineRead = br.readLine()) != null){
                fileText = fileText + lineRead + "\n";
            }
        }catch(FileNotFoundException fnfe){
            System.err.println("FileNotFoundException: " + fnfe.getMessage());
        }catch(IOException ioe){
            System.err.println("IOException: " + ioe.getMessage());
        }
        return fileText;        
    }
}