Question

Hi All I am a newcomer here,

I am using the following code from an open source library (Matrix Toolkits for Java) which outputs the following matrix

  1000       1000                   5      3          5  1.000000000000e+00 

I am trying to do a String split that will return me 1000,1000,5

I tried using String[] parts = str.trim().split('\\s');

but it seems using the \s as a String Token is wrong, any idea what I should use instead?

thanks a lot!

public String toString() {         // Output into coordinate format. Indices start from 1 instead of 0         Formatter out = new Formatter();          out.format('%10d %10d %19d\n', numRows, numColumns, Matrices                 .cardinality(this));          for (MatrixEntry e : this)             if (e.get() != 0)                 out.format('%10d %10d % .12e\n', e.row() + 1, e.column() + 1, e                         .get());          return out.toString();     } 

Answer 1

You should split on any number of spaces, not just single ones. That is, add ‘+’ to your regexp like this:

String[] parts = str.trim().split('\\s+');