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Convert String to integer

Posted on 2002-04-02
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Last Modified: 2010-03-31
have a String.. something like "abc123", need to convert it into another String which contains only numeric characters. ie. the result should be "123"
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Question by:whdev1
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by:bobbit31
ID: 6913795
StringBuffer sb = new StringBuffer("abc123");

for (int i=0;i<sb.length();i++) {
   if (sb.charAt(i) < 30 || sb.charAt(i) > 39) {
       sb = sb.deleteCharAt(i);
   }
}

System.out.println(sb.toString());


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bobbit31 earned 50 total points
ID: 6913822
actually, try this (i tested this one ;))

String s = new String("abc1234567890");
String strReturn = "";

for (int i=0;i<s.length();i++) {
  if ((int) s.charAt(i) >= 48 && (int) s.charAt(i) <= 57) {
      strReturn += s.charAt(i);
  }
}

System.out.println(strReturn);
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