BufferedWriter without try method IOException

Question

I know this topic has been discussed a lot and I have already read a lot of posts here about that, but I still seem to have trouble.

My problem is that I am also a beginner and I don't really understand how ĸwork and the try and catch function.

I have been trying to write to a file some string array, but it doesn't appear in there, nor the catch error is displayed in the console. I don't want to use the try method in this case, because when I am, I cannot use the variable declared for let's say BufferedWriter in other places, I am only restricted to the try method. Otherwise, I get a bug.

This is my code:

import java.io.*;
import java.util.*;
import java.lang.*;
public class FileWrit  {

    public static void main (String[] args){
        try(BufferedWriter writer = new BufferedWriter(new FileWriter("testing.txt"))) {
            String[] anything = new String[3];
            writer.write("anything");
            anything[0] = "case1";
            anything[1] = "This is 1.5";
            anything[2] = "Case 3, i do not know how to count";
            for(String mem: anything) {
                writer.append(mem);
            }
            writer.close();
        } catch(IOException e) {
            System.err.println("Idk when should this appear?");
        }
    }
}

Answer 1

For the "can't use it anywhere" part of your problem, you could declare the variable outside of the try catch block and only assign it inside. You can do a null check wherever else you want to use it to make sure there's no problems, or assign it another value in the catch block. Like so:

public static void main(String[] args) {
 BufferedWriter writer;
 String[] anything;
 try {
  writer = new BufferedWriter(new FileWriter("testing.txt"))) {
  anything = new String[3];
  writer.write("anything");
  anything[0] = "case1";
  anything[1] = "This is 1.5";
  anything[2] = "Case 3, i do not know how to count";
  for (String mem: anything) {
   writer.append(mem);

  }
  writer.close();
 } catch (IOException e) {
  writer = null;
  e.printstacktrace();
 }
}
}


if(writer != null){
       System.out.println(writer);
}

Answer 2

try and catch it's use for managed the exception. try this code:

import java.io.*;
import java.util.*;
import java.lang.*;
public class FileWrit  {

    public static void main (String[] args){
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter("testing.txt"))
            String[] anything = new String[3];
            writer.write("anything");
            anything[0] = "case1";
            anything[1] = "This is 1.5";
            anything[2] = "Case 3, i do not know how to count";
            for(String mem: anything) {
                writer.append(mem);
            }
            writer.close();
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}

The System.err.println("Idk when should this appear?"); appear when you have an Exception in your try "an Error".