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copied!<p>I agree with all the performance and readability posts. However, there are cases where it really does matter. A couple other people mentioned this, but it might be easier to see with examples.</p> <p>Consider this slightly modified example:</p> <pre><code>public static void main(String[] args) { String[] myNumberStrings = new String[] {"1.2345", "asdf", "2.3456"}; ArrayList asNumbers = parseAll(myNumberStrings); } public static ArrayList parseAll(String[] numberStrings){ ArrayList myFloats = new ArrayList(); for(int i = 0; i < numberStrings.length; i++){ myFloats.add(new Float(numberStrings[i])); } return myFloats; } </code></pre> <p>If you want the parseAll() method to return null if there are any errors (like the original example), you'd put the try/catch on the outside like this:</p> <pre><code>public static ArrayList parseAll1(String[] numberStrings){ ArrayList myFloats = new ArrayList(); try{ for(int i = 0; i < numberStrings.length; i++){ myFloats.add(new Float(numberStrings[i])); } } catch (NumberFormatException nfe){ //fail on any error return null; } return myFloats; } </code></pre> <p>In reality, you should probably return an error here instead of null, and generally I don't like having multiple returns, but you get the idea.</p> <p>On the other hand, if you want it to just ignore the problems, and parse whatever Strings it can, you'd put the try/catch on the inside of the loop like this:</p> <pre><code>public static ArrayList parseAll2(String[] numberStrings){ ArrayList myFloats = new ArrayList(); for(int i = 0; i < numberStrings.length; i++){ try{ myFloats.add(new Float(numberStrings[i])); } catch (NumberFormatException nfe){ //don't add just this one } } return myFloats; } </code></pre>

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