java how to check string is number

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Laura
07 Jan 2019
1public static boolean isNumeric(String strNum) {
2    if (strNum == null) {
3        return false;
4    }
5    try {
6        double d = Double.parseDouble(strNum);
7    } catch (NumberFormatException nfe) {
8        return false;
9    }
10    return true;
11}
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