Search For Highest Number In File / Print Its Title And Value

In a text file, I have individual titles (starting with ">" character), and under those titles, I have calculated values for a Counter. I want to search the entire text file for the highest counter under every title. After I get the highest counter, I would like to print it's title, name of the counter, and counter value. Example of the code I already have:

int letterCounter;
String line;
if (line.startsWith (">")) {
bw.write ("
");
bw.write (line);
} else {
//code that counts how many total letters (letterCounter) under title
}

I am just trying to use basic concepts.

Sample of my text file:

>gi 91206428 ref NP_001035160.1 seven transmembrane helix receptor precursor [Homo sapiens]
letterCounter is 43
>gi 157412240 ref NP_001094800.1 C1GALT1-specific chaperone 1-like [Homo sapiens]
letterCounter is 7
>gi 117938299 ref NP_001071105.1 RAB6C-like [Homo sapiens]
letterCounter is 109

Sample of desired output:

>gi 117938299 ref NP_001071105.1 RAB6C-like [Homo sapiens]
letterCounter is 109