Merge pull request #218 from AKS1996/master

Additional files similiar to TheAlgorithms/Python

Others/GuassLengendre.java

@@ -0,0 +1,44 @@
+import java.lang.Math;
+/*
+ * author: @AKS1996
+ * Guass Legendre Algorithm
+ * ref https://en.wikipedia.org/wiki/Gauss–Legendre_algorithm
+ *
+ */
+
+public class GuassLegendre {
+
+	public static void main(String[] args) {
+		for(int i=1;i<=3;++i)
+			System.out.println(pi(i));
+
+	}
+
+	static double pi(int l){
+		/*
+		 * l: No of loops to run
+		 */
+
+		double a = 1,b=Math.pow(2,-0.5),t=0.25,p=1;
+		for(int i=0;i<l;++i){
+			double temp[] = update(a,b,t,p);
+			a = temp[0];
+			b = temp[1];
+			t = temp[2];
+			p = temp[3];
+		}
+
+		return Math.pow(a+b, 2)/(4*t);
+	}
+
+	static double[] update(double a, double b, double t, double p){
+		double values[] = new double[4];
+		values[0] = (a+b)/2;
+		values[1] = Math.sqrt(a*b);
+		values[2] = t - p*Math.pow(a - values[0],2);
+		values[3] = 2*p;
+
+		return values;
+	}
+
+}

Others/PasswordGen.java

@@ -0,0 +1,45 @@
+import java.util.Collections;
+import java.util.Random;
+import java.util.List;
+import java.util.ArrayList;
+
+/*
+    Creates a random password from ASCII letters
+    Given password length bounds
+    
+    author: AKS1996
+    date: 2017-10-25
+*/
+
+class PasswordGen {
+    public static void main(String args[]){
+	String password = generatePassword(8,16);
+	System.out.print("Password: " + password);
+    }
+	
+    static String generatePassword(int min_length, int max_length){
+        Random random = new Random();
+
+        String upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+        String lower = "abcdefghijklmnopqrstuvwxyz";
+        String numbers = "0123456789";
+        String specialChars = "!@#$%^&*(){}?";
+
+        String allChars = upper+lower+numbers+specialChars;
+
+        List<Character> letters = new ArrayList<Character>();
+        for(char c:allChars.toCharArray())
+            letters.add(c);
+
+        // Inbuilt method to randomly shuffle a elements of a list
+        Collections.shuffle(letters);
+        String password = "";
+
+        // Note that size of the password is also random
+        for(int i = random.nextInt(max_length-min_length) + min_length; i>0; --i) {
+            password += letters.get(random.nextInt(letters.size()));
+        }
+
+        return password;
+    }
+}