CODEWITHSUNDEEP
java.util.scanner
handro
handro

Reputation: 85

Java How to Extract a Double from a String from a text File

My Java assignment is to to write a Java application that uses data from a text file with earth quake information and generate a report with:

the count of the number of values read,

the total sum of the magnitudes,

the average magnitude value (to 2 decimal places),

the maximum magnitude value, where it happened and when

the minimum magnitude value, where it happened and when

I can get the file to open using File and Scanner classes but I can't get it to read extract only a double (i.e the magnitudes below: 1.6, 1.8, ect.). I can get it to count the number of lines. I've tried deliminators with the Scanner and Pattern classes and then using Double parse but it won;t work. I'm a rookie for sure and this class just took a leap.

Example of input from text file:

1.6,"Southern California","Wednesday, January 18, 2012 19:19:12 UTC"
1.8,"Southern California","Wednesday, January 18, 2012 19:03:00 UTC"
1.8,"Southern California","Wednesday, January 18, 2012 18:46:53 UTC"
4.7,"Bonin Islands, Japan region","Wednesday, January 18, 2012 18:20:40 UTC"
1.6,"Southern California","Wednesday, January 18, 2012 17:58:07 UTC"

Upvotes: 0

Views: 688

Answers (1)

theDazzler
theDazzler

Reputation: 1059

Try this

String str = "1.6,california,wednesday,whatever";
String[] results = str.split(",");
Double testDouble = Double.valueOf(str[0]);

Upvotes: 1

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