title: Integer.parseInt(String str) java.lang.NumberFormatException: Errors
body: <p>I keep getting number format expectations, even though I'm trimming the strings and they don't contain non numerical characters bizarrely it works for some numbers and not others. Below is an example of a string I get number format exception for. Also, any string starting with 0 e.g "0208405223", is returned 208405223, there's no zero anymore is that supposed to happen?</p>
  
  <pre><code>String n="3020857508";
  Integer a = Integer.parseInt(n.trim());
  System.out.println(a);
  </code></pre>
  
  <p>This is the exception:</p>
  
  <pre><code>Exception in thread "main" java.lang.NumberFormatException: For input string: "3020857508"
      at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
      at java.lang.Integer.parseInt(Integer.java:583)
      at java.lang.Integer.parseInt(Integer.java:615)
      at JavaBeans.Main.main(Main.java:15)
  </code></pre>