Closing scanners.

Conversions/AnyBaseToAnyBase.java

@@ -52,6 +52,7 @@ public static void main(String[] args) {
             }
         }
         System.out.println(base2base(n, b1, b2));
+        in.close();
     }
 
     /**

Conversions/AnytoAny.java

@@ -24,6 +24,7 @@ public static void main(String[] args) {
             dec /= db;
         }
         System.out.println(dn);
+        scn.close();
     }
 
 }

Conversions/DecimalToBinary.java

@@ -53,6 +53,7 @@ public static void bitwiseConversion() {
             n >>= 1;
         }
         System.out.println("\tBinary number: " + b);
+        input.close();
     }
 
 }

Conversions/HexToOct.java

@@ -64,7 +64,6 @@ public static void main(String args[]) {
         // convert decimal to octal
         octalnum = decimal2octal(decnum);
         System.out.println("Number in octal: " + octalnum);
-
-
+        scan.close();
     }
 }

Conversions/HexaDecimalToDecimal.java

@@ -34,7 +34,7 @@ public static void main(String args[]) {
         and it returns the decimal form in the variable dec_output.
         */
         System.out.println("Number in Decimal: " + dec_output);
-
+        scan.close();
 
     }
 }

Conversions/OctalToHexadecimal.java

@@ -59,6 +59,7 @@ public static void main(String args[]) {
         // Pass the decimla number to function and get converted Hex form of the number
         String hex = DecimalToHex(decimal);
         System.out.println("The Hexadecimal equivalant is: " + hex);
+        input.close();
     }
 }
 

DataStructures/Graphs/BellmanFord.java

@@ -100,6 +100,7 @@ public void go()//Interactive run for understanding the class first time. Assume
                 System.out.println();
             }
         }
+        sc.close();
     }
     /**
      * @param source Starting vertex

DataStructures/HashMap/Hashing/Main.java

@@ -42,6 +42,7 @@ public static void main(String[] args) {
 					return;
 				}	
 			}
+			In.close();
 		}
 	}
 }

DataStructures/Trees/RedBlackBST.java

@@ -309,6 +309,7 @@ public void insertDemo() {
             printTreepre(root);
             break;
         }
+        scan.close();
     }
 
     public void deleteDemo() {

DynamicProgramming/EditDistance.java

@@ -74,5 +74,6 @@ public static void main(String[] args) {
         //ans stores the final Edit Distance between the two strings
         int ans = minDistance(s1, s2);
         System.out.println("The minimum Edit Distance between \"" + s1 + "\" and \"" + s2 + "\" is " + ans);
+        input.close();
     }
 }

DynamicProgramming/Fibonacci.java

@@ -22,6 +22,7 @@ public static void main(String[] args) {
         System.out.println(fibMemo(n));
         System.out.println(fibBotUp(n));
         System.out.println(fibOptimized(n));
+        sc.close();
     }
 
     /**

DynamicProgramming/LongestIncreasingSubsequence.java

@@ -17,6 +17,7 @@ public static void main(String[] args) {
         }
 
         System.out.println(LIS(ar));
+        sc.close();
     }
 
     private static int upperBound(int[] ar, int l, int r, int key) {

Maths/PrimeCheck.java

@@ -13,6 +13,7 @@ public static void main(String[] args) {
         } else {
             System.out.println(n + " is not a prime number");
         }
+        scanner.close();
     }
 
     /***

MinimizingLateness/MinimizingLateness.java

@@ -53,5 +53,6 @@ public static void main(String[] args) throws IOException {
         System.out.println();
         System.out.println("Output Data : ");
         System.out.println(lateness);
+        in.close();
     }
 }

Misc/PalindromePrime.java

@@ -9,6 +9,7 @@ public static void main(String[] args) { // Main funtion
         System.out.println("Enter the quantity of First Palindromic Primes you want");
         int n = in.nextInt(); // Input of how many first pallindromic prime we want
         functioning(n); // calling function - functioning  
+        in.close();
     }
 
     public static boolean prime(int num) { // checking if number is prime or not

Others/Dijkshtra.java

@@ -80,5 +80,6 @@ else if (i != src) {
                 System.out.print("-1" + " ");
             }
         }
+        in.close();
     }
 }

Others/InsertDeleteInArray.java

@@ -44,5 +44,6 @@ public static void main(String[] args) {
         }
         for (i = 0; i < size2 - 1; i++)
             System.out.println(b[i]);
+        s.close();
     }
 }

Others/LowestBasePalindrome.java

@@ -29,6 +29,7 @@ public static void main(String[] args) {
         }
         System.out.println(n + " is a palindrome in base " + lowestBasePalindrome(n));
         System.out.println(base2base(Integer.toString(n), 10, lowestBasePalindrome(n)));
+        in.close();
     }
 
     /**

Others/PerlinNoise.java

@@ -162,5 +162,6 @@ public static void main(String[] args) {
 
             System.out.println();
         }
+        in.close();
     }
 }

Others/PowerOfTwoOrNot.java

@@ -20,6 +20,7 @@ public static void main(String[] args) {
         } else {
             System.out.println("Number is not a power of two");
         }
+        sc.close();
     }
 
 
@@ -32,5 +33,4 @@ public static void main(String[] args) {
     public static boolean checkIfPowerOfTwoOrNot(int number) {
         return number != 0 && ((number & (number - 1)) == 0);
     }
-
 }

Others/ReturnSubsequence.java

@@ -13,6 +13,7 @@ public static void main(String[] args) {
         for (int i = 0; i < subsequence.length; i++) {
             System.out.println(subsequence[i]);
         }
+        s.close();
     }
 
     /**

Others/RootPrecision.java

@@ -14,6 +14,8 @@ public static void main(String[] args) {
         // P is precision value for eg - P is 3 in 2.564 and 5 in 3.80870.
         int P = scn.nextInt();
         System.out.println(squareRoot(N, P));
+
+        scn.close();
     }
 
     public static double squareRoot(int N, int P) {

Others/SJF.java

@@ -67,6 +67,7 @@ class Schedule {
             processes.add(p);
             burstAll += p.burstTime;
         }
+        in.close();
 
     }
 

Others/StackPostfixNotation.java

@@ -7,6 +7,7 @@ public static void main(String[] args) {
         Scanner scanner = new Scanner(System.in);
         String post = scanner.nextLine();   // Takes input with spaces in between eg. "1 21 +"
         System.out.println(postfixEvaluate(post));
+        scanner.close();
     }
 
     // Evaluates the given postfix expression string and returns the result.
@@ -35,6 +36,7 @@ public static int postfixEvaluate(String exp) {
                 //  "+", "-", "*", "/"
             }
         }
+        tokens.close();
         return s.pop();
     }
 }

Others/TopKWords.java

@@ -82,6 +82,7 @@ public static void main(String[] args) {
         for (int i = 0; i < k; i++) {
             System.out.println(list.get(list.size() - i - 1));
         }
+        input.close();
     }
 }
 

Others/TowerOfHanoi.java

@@ -22,5 +22,6 @@ public static void main(String[] args) {
         Scanner scanner = new Scanner(System.in);
         int numberOfDiscs = scanner.nextInt(); //input of number of discs on pole 1
         shift(numberOfDiscs, "Pole1", "Pole2", "Pole3"); //Shift function called
+        scanner.close();
     }
 }

ciphers/Caesar.java

@@ -126,6 +126,7 @@ public static void main(String[] args) {
             case 'd':
                 System.out.println("DECODED MESSAGE IS \n" + decode(message, shift));
         }
+        input.close();
     }
 
 }