null checking in the extreme

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Archive for October 13th, 2008

null checking in the extreme

October 13th, 2008 by Jeanne Boyarsky

In Java, we’re told to check for nulls to avoid unexpected null pointer exceptions.  This can be taken too far though.  Consider the following code: StringBuilder builder = new StringBuilder(): if ( builder != null ) { builder.append("data"); } When did builder have the opportunity to become null? By definition, a constructor creates an object. [...]