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How to use regular expression in Java |
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This tip shows the way to validate a string with respect to a regular expression. java.util.regex package is used for regular expression related operations.
In this example the input string (inputStr) is validated with the regular expression (rgString).
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpExp {
public static void main(String[] args) {
String rgString = "write your regulat expression here";
CharSequence inputStr = "write your input string that need to be validated";
Pattern pattern = Pattern.compile(rgString);
Matcher matcher = null;
matcher = pattern.matcher(inputStr);
if (matcher.matches()) {
System.out.println("Matched");
} else {
System.out.println("Not Matched");
}
}
}
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