Created
September 20, 2017 11:32
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Given Number is Octal or not?
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package com.javamultiplex.number; | |
import java.util.Scanner; | |
/** | |
* | |
* @author Rohit Agarwal | |
* @category Number Problems | |
* @problem Number is octal or not | |
* | |
*/ | |
public class OctalNumber { | |
public static void main(String[] args) { | |
Scanner input = null; | |
try { | |
input = new Scanner(System.in); | |
System.out.println("Enter number : "); | |
String number = input.next(); | |
/* | |
* Regular expression that matches string containing only | |
* digits[0-9]. | |
*/ | |
String pattern1 = "^[0-9]+$"; | |
if (number.matches(pattern1)) { | |
/* | |
* Regular expression that matches string containing only octal | |
* digits[0-7]. | |
*/ | |
String pattern2 = "^[0-7]+$"; | |
if (number.matches(pattern2)) { | |
System.out.println("It is octal."); | |
} else { | |
System.out.println("It is not octal."); | |
} | |
} else { | |
System.out.println("Please enter valid number."); | |
} | |
} finally { | |
if (input != null) { | |
input.close(); | |
} | |
} | |
} | |
} |
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