Integer valueOf vs Integer parseInt

Question

Aside from Integer parseInt   handling the minus sign  as documented   are there any other differences between Integer valueOf   and Integer parseInt     And since neither can parse   as a decimal thousands separator  produces NumberFormatException   is there an already available Java method to do that

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First Question  Difference between parseInt and valueOf in java   Second Question   NumberFormat format   NumberFormat getInstance Locale FRANCE   Number number   format parse  1 234    double d   number doubleValue      Third Question   DecimalFormat df   new DecimalFormat    DecimalFormatSymbols symbols   new DecimalFormatSymbols    symbols setDecimalSeparator       symbols setGroupingSeparator       df setDecimalFormatSymbols symbols   df parse p

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The difference between these two methods is    parseXxx   returns the primitive type valueOf   returns a wrapper object reference of the type

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parseInt   parses String to int while valueOf   additionally wraps this int into Integer  That s the only difference   If you want to have full control over parsing integers  check out NumberFormat with various locales

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Integer valueOf   returns an Integer object  while Integer parseInt   returns an int primitive

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Actually  valueOf uses parseInt internally  The difference is parseInt returns an int primitive while valueOf returns an Integer object  Consider from the Integer class source   public static int parseInt String s  throws NumberFormatException       return parseInt s  10      public static Integer valueOf String s  int radix  throws NumberFormatException       return Integer valueOf parseInt s  radix       public static Integer valueOf String s  throws NumberFormatException       return Integer valueOf parseInt s  10        As for parsing with a comma  I m not familiar with one  I would sanitize them   int million   Integer parseInt  1 000 000  replace

[java] Integer.valueOf() vs. Integer.parseInt()

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