Quickly remove non-digits from a Java String with getOnlyNumerics() method.
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In Java, java.lang.Character class has a method; isDigit() which can be used to identify whether a character is a digit or not.Following method can be used for extracting a numbers-only string, by removing all non-digits.
public static String getOnlyNumerics(String str) {
if (str == null) {
return null;
}
StringBuffer strBuff = new StringBuffer();
char c;
for (int i = 0; i < str.length() ; i++) {
c = str.charAt(i);
if (Character.isDigit(c)) {
strBuff.append(c);
}
}
return strBuff.toString();
}
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