I need help with the question below.

import java.util.*;

public class TreeExample2 {

public static void main (String[] argv)
{
// Make instances of a linked-list and a trie.
LinkedList intList = new LinkedList ();
TreeSet intTree = new TreeSet ();

// Number of items in each set.
int collectionSize = 100000;

// How much searching to do.
int searchSize = 1000;

// Generate random data and place same data in each data structure.
int intRange = 1000000;
for (int i=0; i 0)
r_seed = t;
else
r_seed = t + m;
return ( (double) r_seed / (double) m );
}

// U[a,b] generator
public static double uniform (double a, double b)
{
if (b > a)
return ( a + (b-a) * uniform() );
else {
System.out.println ("ERROR in uniform(double,double):a="+a+",b="+b);
return 0;
}
}

// Discrete Uniform random generator - returns an
// integer between a and b
public static long uniform (long a, long b)
{
if (b > a) {
double x = uniform ();
long c = ( a + (long) Math.floor((b-a+1)*x) );
return c;
}
else if (a == b)
return a;
else {
System.out.println ("ERROR: in uniform(long,long):a="+a+",b="+b);
return 0;
}
}

public static int uniform (int a, int b)
{
return (int) uniform ((long) a, (long) b);
}

public static double exponential (double lambda)
{
return (1.0 / lambda) * (-Math.log(1.0 - uniform()));
}

public static double gaussian ()
{
return rand.nextGaussian ();
}


public static double gaussian (double mean, double stdDeviation)
{
double x = gaussian ();
return mean + x * stdDeviation;
}

} // End of class RandTool