CODEWITHSUNDEEP
javastringextract
dimlo
dimlo

Reputation: 25

I need to extract numbers from a String in Java

In my program, I need to extract numbers from a String the given string is the following.

String numberOfHours = "12.0  8.0  7.0  7.0  10.0  8.0  0.0  2.0";

I need to extract each value into an array. When I use the split method from the String class I get a null value and also I don't get all the numbers in the array. Here's the code.

   String pieces[] = numberOfHours.split("  ");  

    for(int i = 0 ; i < hoursPerDay.length ; i++){
            System.out.println(pieces[i]); 
    }

Thanks in advance!

Upvotes: 1

Views: 569

Answers (2)

mistahenry
mistahenry

Reputation: 8724

public static void main(String[] args){
    String numberOfHours = "12.0  8.0  7.0  7.0  10.0  8.0  0.0  2.0";
    String pieces[] = numberOfHours.split("\\s+");
    int num[] = new int[pieces.length];
    for(int i = 0; i < pieces.length; i++){
        //must cast to double here because of the way you formatted the numbers
        num[i] = (int)Double.parseDouble(pieces[i]);
    }
    for(int i = 0; i < num.length; i++){
        System.out.println(num[i]);
    }
}

Upvotes: 0

Paolof76
Paolof76

Reputation: 909

This:

String numberOfHours = "12.0  8.0  7.0  7.0  10.0  8.0  0.0  2.0";
String pieces[] = numberOfHours.split("\\s+");
System.out.println(pieces.length);

prints: "8". Is it what you're looking for?

Upvotes: 4

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