title: Unclosed Character Class Error?
body: <p>Here is the error:</p>
  
  <pre><code>Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 3
  ], [
     ^
      at java.util.regex.Pattern.error(Pattern.java:1924)
      at java.util.regex.Pattern.clazz(Pattern.java:2493)
      at java.util.regex.Pattern.sequence(Pattern.java:2030)
      at java.util.regex.Pattern.expr(Pattern.java:1964)
      at java.util.regex.Pattern.compile(Pattern.java:1665)
      at java.util.regex.Pattern.&lt;init&gt;(Pattern.java:1337)
      at java.util.regex.Pattern.compile(Pattern.java:1022)
      at java.lang.String.split(String.java:2313)
      at java.lang.String.split(String.java:2355)
      at testJunior2013.J2.main(J2.java:31)
  </code></pre>
  
  <p>This is the area of the code that is causing the issues.</p>
  
  <pre><code>String[][] split = new String[1][rows];
  
  split[0] = (Arrays.deepToString(array2d)).split("], ["); //split at the end of an array row
  </code></pre>
  
  <p>What does this error mean and what needs to be done to fix the code above?</p>