Question

Generating pseudo-random numbers. Develop a data type for generating pseudo-random numbers. That is, convert StdRandom to a data type. Instead of using Math.random(), base your data type on a linear congruential generator. This method traces to the earliest days of computing and is also a quintessential example of the value of maintaining state in a computation (implementing a data type). To generate pseudo-random int values, maintain an int value x (the value of the last “random” number returned). Each time the client asks for a new value, return a*x + b for suitably chosen values of a and b (ignoring overflow). Use arithmetic to convert these values to “random” values of other types of data. As suggested by D. E. Knuth, use the values 3141592621 for a and 2718281829 for b. Provide a constructor allowing the client to start with an int value known as a seed (the initial value of x). This ability makes it clear that the numbers are not at all random (even though they may have many of the properties of random numbers) but that fact can be used to aid in debugging, since clients can arrange to see the same numbers each time.

Please use java to complete

Answer 1

PseudoRandom.java

=============================

package random;

public class PseudoRandom {
   // use formula return = a*x + b for linear congruential generator
  
   // data field
   // the value of the last “random” number returned
   private int int_x;
   private long long_x;
   private float float_x;
   private double double_x;
  
   // values suggested by D. E. Knuth
   private final long a = 3141592621L;
   private final long b = 2718281829L;
  
   // constructor
   public PseudoRandom(int seed) {
       // initialize data fields
       int_x = seed;
       long_x = seed;
       float_x = seed;
       double_x = seed;
   }
  
   public int nextInt() {
       int_x = (int) (a*int_x + b);
       return int_x;
   }

   public long nextLong() {
       long_x = a*long_x + b;
       return long_x;
   }

   public float nextFloat() {
       float_x = a*float_x + b;
       return float_x;
   }
  
   public double nextDouble() {
       double_x = a*double_x + b;
       return double_x;
   }

   public boolean nextBoolean() {
       int_x = (int) (a*int_x + b);
       return (int_x) % 2 == 0;
   }
}

===================================

Tester.java

===================================

package random;

public class Tester {

   // main method to test Pseudo Random generator
   public static void main(String[] args) {
       // create a PseudoRandom object
       PseudoRandom prand = new PseudoRandom(326); // seed 326
       // generate 5 numbers for each type
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
      
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
      
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
      
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
      
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
   }
}

let me know if you have any problem or want any modification in class. thank you.

Answer 2

Answer:-

PseudoRandom.java

=============================

package random;

public class PseudoRandom {
   // use formula return = a*x + b for linear congruential generator
  
   // data field
   // the value of the last “random” number returned
   private int int_x;
   private long long_x;
   private float float_x;
   private double double_x;
  
   // values suggested by D. E. Knuth
   private final long a = 3141592621L;
   private final long b = 2718281829L;
  
   // constructor
   public PseudoRandom(int seed) {
       // initialize data fields
       int_x = seed;
       long_x = seed;
       float_x = seed;
       double_x = seed;
   }
  
   public int nextInt() {
       int_x = (int) (a*int_x + b);
       return int_x;
   }

   public long nextLong() {
       long_x = a*long_x + b;
       return long_x;
   }

   public float nextFloat() {
       float_x = a*float_x + b;
       return float_x;
   }
  
   public double nextDouble() {
       double_x = a*double_x + b;
       return double_x;
   }

   public boolean nextBoolean() {
       int_x = (int) (a*int_x + b);
       return (int_x) % 2 == 0;
   }
}

===================================

Tester.java

===================================

package random;

public class Tester {

   // main method to test Pseudo Random generator
   public static void main(String[] args) {
       // create a PseudoRandom object
       PseudoRandom prand = new PseudoRandom(326); // seed 326
       // generate 5 numbers for each type
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
       System.out.println("Integer: " + prand.nextInt());
      
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
       System.out.println("Long: " + prand.nextLong());
      
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
       System.out.println("Float: " + prand.nextFloat());
      
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
       System.out.println("Double: " + prand.nextDouble());
      
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
       System.out.println("Boolean: " + prand.nextBoolean());
   }
}

Output Screenshot:-

Note: Could you please consider my effort on this work and give up vote. Thank you :)