Thread: I can't isolate the first four colums y,m,d,t

I'm trying to get the year, month, day and time isolated so I can then I can make it populate in a different format.

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
 
public class CSVDateandTime {
 
	public static void main(String [] args) {
 
		String fileName = "solar.all";
		File file = new File(fileName);	
 
		try {
			Scanner inputStream = new Scanner(file);
			while (inputStream.hasNext()){
				String data = inputStream.next(); //gets a whole line
				String [] values = data.split(",");
					System.out.println(data + "***");
			}
 
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
 
	}
}

solar.txt

Can you post the console from when you execute the code that shows what it is doing?

Add a println() to print out the value of data before it is split.

Where in the posted code is an array indexed?
Can you copy and paste here the full text of the error message? You can't copy and paste from an image.


The code should make sure the index does not go past the end of the array.
Remember array indexes start at 0 and go to the length-1.

I do not have an array

String [] values =
...
System.out.println(values [1] + "***");

values is an array.
How do know that the values array has two elements? 1 is the index for second element

Where is the print out of the data variable? For debugging you need to do that to show you what is being read.

What is printed out when you print out the value of the variable: data?
Is is what you expect to see?

What prints out when you print out the value of the variable: data?
Can you copy and paste here what is printed?

get it to just show the y,m,d,t?

Can you post what you want printed? If the values array has 4 or more elements do you want to see the first 4 elements? To see the contents of the values array use the Arrays class's toString method somethng like this:

System.out.println("an ID "+ java.util.Arrays.toString(theArrayName));

The posted code has two println() statements. What is printed by the first one and what is printed by the second one? Add an ID String to each so that you can tell:

System.out.println ("data="+ data + "<" ) ;
...
System.out.println("Values[0]="+values [0] + "*");

I just want the first 4 elements.

Check if values has 4 or more elements. If it does, get the first 4 elements for your data.