title: Java: newbie "javac: invalid flag" compile error
body: <p>I'm trying to compile a Java 1.6 program. The following compiles without error:</p>
  
  <pre><code># javac -cp /path/to/ojdbc6.jar:. MyJavaProgram.java
  </code></pre>
  
  <p>But adding a flag causes this error:</p>
  
  <pre><code># javac -cp /path/to/ojdbc6.jar:. -Doracle.jdbc.SetFloatAndDoubleUseBinary=true MyJavaProgram.java -help
  javac: invalid flag: -Doracle.jdbc.SetFloatAndDoubleUseBinary=true
  Usage: javac &lt;options&gt; &lt;source files&gt;
  use -help for a list of possible options
  </code></pre>
  
  <p>Is the flag not supported? I added the <code>-help</code> but it didn't give any more info (did I add it in the right place above?). </p>