Merge remote-tracking branch 'upstream/master'

Data Structures/Matrix/Matrix.java

@@ -221,4 +221,20 @@ public class Matrix {
 
         return str;
     }
+	
+	/**
+    * Returns transposed matrix of this matrix.
+    *
+    * @return transposed Matrix. 
+    */
+	public Matrix transpose() {
+		
+		int[][] newData = new int[this.data[0].length][this.data.length];
+
+		for (int i = 0; i < this.getColumns(); ++i)
+			for(int j = 0; j < this.getRows(); ++j)
+				newData[i][j] = this.data[j][i];
+
+		return new Matrix(newData);
+	}		
 }

Misc/PalindromicPrime.java

@@ -0,0 +1,41 @@
+import java.util.Scanner;
+public class PalindromePrime {
+
+    public static void main(String[] args) { // Main funtion
+        Scanner in = new Scanner(System.in);
+        System.out.println("Enter the quantity of First Palindromic Primes you want");
+        int n = in.nextInt(); // Input of how mant first pallindromic prime we want
+        funtioning(n); // calling funtion - functioning  
+    }
+
+    public static boolean prime(int num) { // checking if number is prime or not
+        for (int divisor = 2; divisor <= num / 2; divisor++) {
+            if (num % divisor == 0) {
+                return false; //  false if not prime
+            }
+        }
+        return true; // True if prime
+    }
+
+    public static int reverse(int n){ //  Returns  the reverse of the number
+        int reverse = 0;
+        while(n!=0){
+            reverse = reverse * 10;
+            reverse = reverse + n%10;
+            n = n/10;
+        }
+        return reverse;
+    }
+
+    public static void funtioning(int y){
+            int count =0;
+            int num = 2;
+            while(count < y){
+                if(prime(num) && num == reverse(num)){ // number is prime and it's reverse is same
+                    count++; // counts check when to terminate while loop
+                    System.out.print(num + "\n"); // Print the Palindromic Prime
+                }
+                num++; // inrease iterator value by one
+            }
+    }
+};

Others/CountChar.java

@@ -14,7 +14,7 @@ public class CountChar {
   	  	Scanner input = new Scanner(System.in);
   	  	System.out.print("Enter your text: ");
       	String str = input.nextLine();
-
+        input.close();
         System.out.println("There are " + CountCharacters(str) + " characters.");
     }
 	
@@ -24,7 +24,7 @@ public class CountChar {
      * @return int: Number of characters in the passed string
      * */
 
-    public static int CountCharacters(String str) {
+    private static int CountCharacters(String str) {
 
     	int count = 0;
 

Others/PowerOfTwoOrNot.java

@@ -0,0 +1,33 @@
+import java.util.Scanner;
+
+/**
+*A utility to check if a given number is power of two or not.
+*For example 8,16 etc.
+*/
+public class PowerOfTwoOrNot {
+	
+	public static void main (String[] args) {
+	
+		Scanner sc = new Scanner(System.in);
+		System.out.println("Enter the number");
+		int num = sc.nextInt();
+		boolean isPowerOfTwo = checkIfPowerOfTwoOrNot(num);
+		if (isPowerOfTwo) {
+			System.out.println("Number is a power of two");
+		} else {
+			System.out.println("Number is not a power of two");
+		}
+	}
+
+
+/**
+* Checks whether given number is power of two or not.
+*
+* @param number
+* @return boolean
+*/
+public static boolean checkIfPowerOfTwoOrNot(int number) {
+		return number != 0 && ((number & (number-1)) == 0);
+	}
+
+}

Others/countwords.java

@@ -18,8 +18,8 @@ import java.util.Scanner;
 	  input.close();
         } 
 
-        public static int wordCount(String s){
+        private static int wordCount(String s){
-          if(s.isEmpty() || s == null) return -1;
+          if(s.isEmpty() || s == null) return 0;
           return s.trim().split("[\\s]+").length;
         }