isbn

isbn number.java

@@ -0,0 +1,73 @@
+import java.util.*;   
+import java.io.*;   
+import java.util.Scanner;  
+
+//create ISBNNumberExample class to check whether the given number is a valid ISBN or not  
+class ISBNNumberExample {   
+
+     static boolean checkISBNNumber(long number)  
+    {  
+            int sum = 0;  
+    int i, t, intNumber, dNumber;  
+    String strNumber;  
+
+    strNumber = ""+number;  
+
+    if (strNumber.length() != 10) {  
+                    return false;  
+            }  
+
+            for (i = 0; i < strNumber.length(); i++) {  
+                    intNumber = Integer.parseInt(strNumber.substring(i, i+1));  
+                    dNumber = i + 1;  
+                    t = dNumber * intNumber;  
+                    sum = sum + t;  
+            }  
+
+            // check whether the sum is divisible by 11 or not  
+
+            if ((sum % 11) == 0) {  
+                    return true;  
+            }  
+
+    return false;  
+
+    }  
+
+    // main() method start  
+    public static void main(String args[])   
+    {     
+long n1, n2;  
+
+    try {  
+
+        //create BufferedReader class object to get input from user  
+        InputStreamReader in = new InputStreamReader(System.in);  
+        BufferedReader br = new BufferedReader(in);  
+
+        //show custom message  
+        System.out.println("Enter first 10 digit ISBN number");  
+
+        //store user entered value into variable n1  
+        n1 = Long.parseLong(br.readLine());  
+
+        //show custom message  
+        System.out.println("Enter second 10 digit ISBN number");  
+
+        //store user entered value into variable n2  
+        n2 = Long.parseLong(br.readLine());  
+
+        if (checkISBNNumber(n1))   
+            System.out.println(n1 + " is a valid ISBN number");   
+        else  
+            System.out.println(n1 + " is not a valid ISBN number");   
+        if (checkISBNNumber(n2))   
+            System.out.println(n2 + " is a a valid ISBN number");   
+        else  
+            System.out.println(n2 + " is not a valid ISBN number");  
+
+        }catch(java.lang.Exception e) {  
+            System.out.println("Error while reading the data.");  
+        }   
+        }   
+}