Using valueOf() Instead of toString()

The valueOf() method is useful when you do not know the value contained and it might throw a NullPointerException. It returns null and you can handle the same in your code as needed.

The toString() on the other hand does not handle it and throws the exception.

public class UsingValueOf{   public static void main(String args[])   {      UsingValueOf usingValueOf = new UsingValueOf();      usingValueOf.proceed();   }      private void proceed()   {      String nullString = null;      try      {         //Using toString() will throw NullPointerException         System.out.println(nullString.toString());      }catch(NullPointerException npe)      {         System.out.println("Exception: nullString is null");      }      //Using valueOf() will NOT throw NullPointerException      System.out.println(String.valueOf(nullString));   }}
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