*q1: Write a public static method named q1 that takes an ArrayList of Doubles as
ID: 3706328 • Letter: #
Question
*q1: Write a public static method named q1 that takes an ArrayList of Doubles as a * parameter and returns an int. This method returns the index of the first value in the input that is in the range (-2.95, 15.190000000000001) and returns -1 if the input * contains no values in this range *q2: Write a public static method named q2 that takes an ArrayList of Doubles as a *parameter and returns an int. This method returns the index of the first value in the input that is in the range (0.73, 10.98) and returns -1 if the input contains no values in this range * q3: Write a public static method named q3 that takes an ArrayList of Doubles as a *parameters and returns a double. This method returns the value from the input ArrayList that is closest to 37.57 *q4: Write a public static method named q4 that takes an ArrayList of type Integer and returns an int. This method returns the minimum result (do not return the original value) * of taking the absolute value of each value from the input while considering only negative numbers from the input:s *q5: Write a public static method named q5 that takes an ArrayList of type Integer and * returns a double. This method returns the maximum result (do not return the original *value) of taking the tangent of each value from the input while considering only negative numbers from the inputsExplanation / Answer
public static int q1( ArrayList<Double> arr )
{
int i;
// traverse the ArrayList
for( i = 0 ; i < arr.size() ; i++ )
{
// if the current element is in range ( -2.95 - 15.190000000000001 )
if( arr.get(i) >= -2.95 && arr.get(i) <= 15.190000000000001 )
return i;
}
// if no element is in the required range
return -1;
}
public static int q2( ArrayList<Double> arr )
{
int i;
// traverse the ArrayList
for( i = 0 ; i < arr.size() ; i++ )
{
// if the current element is in range ( 0.73 - 10.98 )
if( arr.get(i) >= 0.73 && arr.get(i) <= 10.98 )
return i;
}
// if no element is in the required range
return -1;
}
public static double q3( ArrayList<Double> arr )
{
int i;
// let the closest element be the first element of arr
double ans = arr.get(0);
// calculate the difference between 37.57 and the current element
double diff = Math.abs( 37.57 - arr.get(0) );
// traverse the ArrayList
for( i = 1 ; i < arr.size() ; i++ )
{
// calculate the difference between 37.57 and current element
double curr_diff = Math.abs( 37.57 - arr.get(i) );
// if the curr_diff is less than diff
if( curr_diff < diff )
{
ans = arr.get(i);
diff = curr_diff;
}
}
// if no element is in the required range
return ans;
}
public static int q4( ArrayList<Integer> arr )
{
int i;
// initialize ans to maximum integer value
int ans = Integer.MAX_VALUE;
// traverse the ArrayList
for( i = 0 ; i < arr.size() ; i++ )
{
// if current element is negative
if( arr.get(i) < 0 )
{
// if the absolute value of current element is smaller than ans
if( Math.abs(ar.get(i)) < ans )
ans = Math.abs(ar.get(i));
}
}
return ans;
}
public static double q5( ArrayList<Integer> arr )
{
int i;
// initialize ans to minimum integer value
double max = Integer.MIN_VALUE;
// traverse the ArrayList
for( i = 0 ; i < arr.size() ; i++ )
{
// if current element is negative
if( arr.get(i) < 0 )
{
// if the tangent value of current element is smaller than min
if( Math.tan( arr.get(i) ) > max )
max = Math.tan( arr.get(i) );
}
}
return max;
}
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