Java Community | Help. Code. Learn.•3w ago

printing area's of an array on different lines depending on section

so, I've been trying to figure out how to write different parts of an array out to different lines of a txt file for a project that i've been working on. I have tried multiple methods but it usually writes all of the info to one line. I am hoping to print out the different parts of the array without going in and writing out every single variable of the array that I want to have on each line. I can provide the code if needbe to make things easier.

59 Replies

JavaBot•3w ago

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Royalrex25OP•3w ago

here is my code to help with potentially figuring out my issue

CustomerDataBase.jav...

JavaBot•3w ago

119ms

dan1st•3w ago

What exactly is the issue there? What exactly is written in a single line?

Royalrex25OP•3w ago

so, I need the names to be on one line, the passwords on the next, the item names on the line below the passwords, and the prices to be on the line below the items but everything gets printed on one line per customer. each customer is seperated properly, but I need the sections mentioned above to be printed on 4 seperate lines do you want the output txt file?

dan1st•3w ago

So you want all names of all users in one line? instead of one line for each user?

Royalrex25OP•3w ago

no, I want the users seperated the way they are but each section of each user to be on a seperate line per person: Name Passwords Items Costs but I want the users to stay seperated

dan1st•3w ago

So there can be multiple names for a user - what should happen in that case?

Royalrex25OP•3w ago

I mean with the username, Name, and Last Name on the same line I made sure that no user would have multiple names

dan1st•3w ago

What is writer.write(names.trim().replaceAll(", $", "") + "\n"); supposed to do?

Royalrex25OP•3w ago

it's supposed to write the next section to a new line but it didn't work

dan1st•3w ago

Are multiple sections written in a single line?

Royalrex25OP•3w ago

yep, but it's supposed to be one section per line

dan1st•3w ago

Can you try printing names via System.out.println()? Does that print the correct thing?

Royalrex25OP•3w ago

well, its supposed to print to a txt file

dan1st•3w ago

I mean for testing If you just print names, does the print the right thing in its own line? Or does it maybe print names and also the other stuff in a single line yes I think that makes sense

Royalrex25OP•3w ago

it doesn't print anything out

dan1st•3w ago

nothing or an empty line?

Royalrex25OP•3w ago

heres the txt file

CustomerDataBase.txt

Royalrex25OP•3w ago

empty line

dan1st•3w ago

Can you try

System.out.println("names: "+names);
System.out.println("passwds: "+passRecord);
System.out.println("items: "+itemRecord);
System.out.println("prices: "+priceRecord);

System.out.println("names: "+names);
System.out.println("passwds: "+passRecord);
System.out.println("items: "+itemRecord);
System.out.println("prices: "+priceRecord);

for testing Is that the input or the output?

Royalrex25OP•3w ago

output

dan1st•3w ago

oh I see

Royalrex25OP•3w ago

and the code you asked me to put in only prints the word but nothing else

dan1st•3w ago

So you are iterating over the customer info the first entry is Username: JennyH

Royalrex25OP•3w ago

yep, but it only prints out the word specified in the console

dan1st•3w ago

but that isn't equal to anything so you just add it to names then you encounter FirstName: Jenny but it also doesn't equal anything so you add it to names etc

Royalrex25OP•3w ago

gotta go, bot I'll continue later thanks for the help so far

dan1st•3w ago

What you can do is split each of the Strings by : then the first element is the entry name and the second element is the value

Royalrex25OP•3w ago

how would that work in terms of printing everything out?

dan1st•3w ago

you can still print it out as you are currently doing it I don't think printing is the issue

Royalrex25OP•3w ago

then what do you think it is?

dan1st•3w ago

how you are getting the variables you are printing

Royalrex25OP•3w ago

i coded it so that the program prints the string

dan1st•3w ago

for (String info : customerInfo) {
  String[] split = info.split(": ");
  if(split.length > 1){
    String value = split[1];
    switch(split[0]){
      case "Username" -> names += value;
      case "PassRecord" -> passRecord += value;
      case "ItemRecord" -> itemRecord += value;
      case "PriceRecord" -> priceRecord += value;
      default -> {};
    }
  }
}
writer.write(names+"\n");
writer.write(passRecord+"\n");
writer.write(itemRecord+"\n");
writer.write(priceRecord+"\n");

for (String info : customerInfo) {
  String[] split = info.split(": ");
  if(split.length > 1){
    String value = split[1];
    switch(split[0]){
      case "Username" -> names += value;
      case "PassRecord" -> passRecord += value;
      case "ItemRecord" -> itemRecord += value;
      case "PriceRecord" -> priceRecord += value;
      default -> {};
    }
  }
}
writer.write(names+"\n");
writer.write(passRecord+"\n");
writer.write(itemRecord+"\n");
writer.write(priceRecord+"\n");

maybe you want to do something alone the lines of that?

JavaBot•3w ago

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Royalrex25OP•3w ago

where in the code would I place it?

dan1st•3w ago

where you previously had the same loops and write the output

Royalrex25OP•3w ago

cool, thanks for the help, ill try it out now

dan1st•3w ago

btw that's just an example of what it could look like

Royalrex25OP•3w ago

wdym "just an example"? and the "default -> {};" line errors out

dan1st•3w ago

idk whether that's exactly what you want I think you can just do default -> "";

Royalrex25OP•3w ago

give me an error saying it's not a statement

dan1st•3w ago

ok then you can just delete that line

Royalrex25OP•3w ago

will it break anything if I do?

dan1st•3w ago

Royalrex25OP•3w ago

so, now it just prints the first entry

Royalrex25OP•3w ago

Here is the txt

CustomerDataBase.txt

dan1st•3w ago

oh these are multiple entries after each other that's why you did that

Royalrex25OP•3w ago

yeah

dan1st•3w ago

I think that one was fine except it should have been if (info.equals("PassRecord: ")) { (note the additional space) and also for the others

Royalrex25OP•3w ago

wait, which section of the code was this for again?? I forgot yeah, it's like that in the code u there?

dan1st•3w ago

but you forgot a space in your code

Royalrex25OP•3w ago

where?

dan1st•3w ago

like here before the " and also for the others

Royalrex25OP•3w ago

ohh, now I see what you meant IT WORKS!!!! THANK YOU!!!!!!!

JavaBot•3w ago

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Royalrex25OP•3w ago

you have no idea how long it took me to get that working Thank you so much!!!

JavaBot•3w ago

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printing area's of an array on different lines depending on section