import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test13 {
public static void main(String[] args) {
System.out.println(isPositiveDecimal("-0.9"));
System.out.println(isPositiveDecimal("0.9"));
System.out.println(isNegativeDecimal("-0.9"));
System.out.println(isNegativeDecimal("0.9"));
}
public static boolean isPositiveDecimal(String orginal){
return isMatch("\\+{0,1}[0]\\.[1-9]*|\\+{0,1}[1-9]\\d*\\.\\d*", orginal);
}
public static boolean isNegativeDecimal(String orginal){
return isMatch("^-[0]\\.[1-9]*|^-[1-9]\\d*\\.\\d*", orginal);
}
private static boolean isMatch(String regex, String orginal){
if (orginal == null || orginal.trim().equals("")) {
return false;
}
Pattern pattern = Pattern.compile(regex);
Matcher isNum = pattern.matcher(orginal);
return isNum.matches();
}
}
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