How to read and validate different portions of a line of text in a text file in Java? -

so i'm trying validate data in text file using java. text file looks (ignore bullet points):

• 51673 0 98.85
• 19438 5 95.00
• 00483 3 73.16
• p1905 1 85.61
• 80463 2 73.16
• 76049 4 63.48
• 34086 7 90.23
• 13157 0 54.34
• 24937 2 81.03
• 26511 1 74.16
• 20034 4 103.90

the first column of numbers needs within range of 00000-99999 , not letters, second column needs within range of 0-5, , third column needs within range of 0.00-100.00. how able validate each of these columns in text file separately meet requirements? know how read text file, i'm trying figure out how validate data.

so have line, string line = "20034 4 103.90";.

you can break consituent parts using .split().

then inspect/validate each of them individually before repeating same next line.

so, splitting delimiter " ", since separates columns.

string[] parts = line.split(" "); string part1 = parts[0]; // 20034 string part2 = parts[1]; // 4 string part3 = parts[2]; // 203.90 

you can play around here http://ideone.com/lcnyq9

validation

regarding validation, it's quite easy.

1. for column 1, can if (i > 0 && < 100000)
2. same column 2, if (i > 0 && < 6)

to check if column 1 doesn't contain letters, can use this:

part1.contains("[a-za-z]+") == false inside if statement.