Reading a Multi-line text file with different data in each line

Question

I'm attempting to read a text file with Scanner dataFile = new Scanner("FileName.txt"); the text file has lines which are supposed to be read for info on them. I'm using:

while(dataFile.hasNext()){
      String line = dataFile.nextLine();
      ...
}

to loop through the lines. I need to extract a String at the start of the line, an Integer after the String, and a Double after the Integer. They have spaces in-between each part I need to extract so I am willing to \ make a substring search through the line to individually search for the parts in the line.

I am wondering, Is there an easier and quicker method to doing this?

Example contents of text file:

Name 10 39.5
Hello 75 87.3
Coding 23 46.1
World 9 78.3

Split the line with spaces as the delimiter: https://stackoverflow.com/questions/7899525/how-to-split-a-string-by-space — Evan Weissburg, Nov 20 '17 at 01:47

score 1 · Accepted Answer · answered Nov 20 '17 at 01:48

1

If they're all the same format, you can split on whitespace.

String str = "Name 10 39.5";
String[] arr = str.split(" ");
String s = arr[0];
int i = Integer.valueOf(arr[1]);
double d = Double.valueOf(arr[2]);

answered Nov 20 '17 at 01:48

Touniouk

375
1
13

1

You might want to split on `\\s+`, if there is any chance that there could more than one whitespace character, or whitespace other than space. – Tim Biegeleisen Nov 20 '17 at 01:50

score 0 · Answer 2 · answered Nov 20 '17 at 01:59

0

substring search？

you may use

String[] str=line.split(" ");

and then str[0] is the string you find
str[1] is the string of Integer ,you cast it
and the str[2] is the string of Double , cast

answered Nov 20 '17 at 01:59

Joe F

13
2

Reading a Multi-line text file with different data in each line

2 Answers2