title: java: boolean instanceOf Boolean?
body: <p>I'm a bit confused: I have a function, that takes an Object as argument. But the compiler does not complain if I just pass a primitive and even recognizes a boolean primitive as Boolean Object. Why is that so? </p>
  
  <pre><code>public String test(Object value)
  {
     if (! (value instanceof Boolean) ) return "invalid";
     if (((Boolean) value).booleanValue() == true ) return "yes";
     if (((Boolean) value).booleanValue() == false ) return "no";
     return "dunno";
  }
  
  String result = test(true);  // will result in "yes"
  </code></pre>