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POread a small file contail a Long number in one goal and get ride of the carriage return \n
 

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    <p>I have a small file test.txt contains a Long number inside while another piece of java code to read the Long constantly from the file.</p> <p>Here is the steps:</p> <p>Run</p> <pre><code>echo "123" &gt; test.txt </code></pre> <p>then if you go to the test.txt file, vim test.txt -> :set list, you will see the file looks like:</p> <pre><code>123$ </code></pre> <p>I have a piece of java code does the following:</p> <pre><code>byte[] testBytes = File.readAllBytes(test.txt); String testString = new String(testBytes); // in debug mode, testString looks like "123\n" long bytesEverRead = Long.parseLong(testString); // this line throws exception because parseLong("123\n") won't work </code></pre> <p>As you can see above, "123\n" is being read from the file which cause my parseLong failed. How can I read 123 out from test.txt without having \n with it. What's the best way to handle this?</p>
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