Implemetations for methods...................... ASAP /** * Returns the maximum
ID: 3749028 • Letter: I
Question
Implemetations for methods...................... ASAP
/**
* Returns the maximum number of complete revolutions equivalent to
* a number of degrees not greater than the given number of degrees
* (there are 360 degrees in one revolution). For example:
*
* <pre>
* numRevolutions(0) returns 0
* numRevolutions(1) returns 0
* numRevolutions(360) returns 1
* numRevolutions(719) returns 1
* numRevolutions(720) returns 2
* numRevolutions(800) returns 2
* </pre>
*
* @param degrees a number of degrees not less than zero
* @return the maximum number of complete revolutions not greater than
* the given number of degrees
*/
public static long numRevolutions(long degrees) {
}
/**
* Returns the number of degrees on a circle that is equivalent to the
* given number of degrees. The returned value is always between 0
* and 359 degrees, inclusive. For example:
*
* <pre>
* fixAngle(0) returns 0
* fixAngle(1) returns 1
* fixAngle(359) returns 359
* fixAngle(360) returns 0
* fixAngle(700) returns 340
* fixAngle(720) returns 0
* fixAngle(725) returns 5
* </pre>
*
* @param degrees a number of degrees not less than zero
* @return the number of degrees on a circle that is equivalent to the
* given number of degrees
*/
public static int fixAngle(long degrees) {
}
/**
* Returns the mathematical average of 3 values.
*
* @param a a value
* @param b a value
* @param c a value
* @return the average of a, b, and c
*/
public static double avg(int a, int b, int c) {
}
/**
* Returns true if {@code x} is even and false otherwise.
*
* @param x a value
* @return true if x is even and false otherwise
*/
public static boolean isEven(int x) {
}
/**
* Returns true if {@code units} is not a valid unit for
* a temperature and false otherwise. A valid unit
* is either the string {@code "C"} (for degrees Celcius)
* or the string {@code "F"} (for degrees Fahrenheit).
*
* @param units a string
* @return true if units is not a valid unit for
* a temperature and false otherwise
*/
public static boolean badUnits(String units) {
}
/**
* Returns true if {@code x} is between the values
* {@code lo} and {@code hi}. Returns {@code false}
* if {@code x} is equal to {@code lo} or {@code hi}.
*
* @param x a value
* @param lo a value
* @param hi a value
* @return true if {@code x} is between the values
* {@code lo} and {@code hi}
*/
public static boolean isInRange(double x, double lo, double hi) {
}
/**
* Increments the given counter if the value of the counter
* is even.
*
* <p>
* Decrements the given counter if the value of the counter
* is odd.
*
* <p>
* Increments the given counter two times if the value of the counter
* is zero.
*
* @param c a counter
*/
public static void twiddle(HiddenCounter c) {
}
/**
* Swaps the first and last elements of a list. For example if
* {@code t} is the list {@code ["a", "b", "c"]} then swapping the
* first and last elements causes {@code t} to become the list
* {@code ["c", "b", "a"]}.
*
* @param t a list of strings
*/
public static void swapFirstAndLast(List<String> t) {
}
/**
* Returns the number of short words in the given list of strings.
* A short word is a string whose length is less than or equal to 2.
* This method does not modify the list {@code t}.
*
* @param t a list of strings
* @return the number of short words in the given list of strings
*/
public static int numShortWords(List<String> t) {
}
}
Explanation / Answer
All methods other than twiddle() have been implemented. twiddle() makes use of some class HiddenCounter and that class is not provided in question. Please do rate the answer if it helped. Thank you.
/**
*
* Returns the maximum number of complete revolutions equivalent to
*
* a number of degrees not greater than the given number of degrees
*
* (there are 360 degrees in one revolution). For example:
*
*
*
* <pre>
* numRevolutions(0) returns 0
* numRevolutions(1) returns 0
* numRevolutions(360) returns 1
* numRevolutions(719) returns 1
* numRevolutions(720) returns 2
* numRevolutions(800) returns 2
*
* </pre>
*
*
*
* @param degrees
* a number of degrees not less than zero
*
* @return the maximum number of complete revolutions not greater than
*
* the given number of degrees
*
*/
public static long numRevolutions(long degrees) {
return degrees / 360;
}
/**
*
* Returns the number of degrees on a circle that is equivalent to the
*
* given number of degrees. The returned value is always between 0
*
* and 359 degrees, inclusive. For example:
*
*
*
* <pre>
* fixAngle(0) returns 0
* fixAngle(1) returns 1
* fixAngle(359) returns 359
* fixAngle(360) returns 0
* fixAngle(700) returns 340
* fixAngle(720) returns 0
* fixAngle(725) returns 5
*
* </pre>
*
*
*
* @param degrees
* a number of degrees not less than zero
*
* @return the number of degrees on a circle that is equivalent to the
*
* given number of degrees
*
*/
public static int fixAngle(long degrees) {
return (int) (degrees % 360);
}
/**
*
* Returns the mathematical average of 3 values.
*
*
*
* @param a
* a value
*
* @param b
* a value
*
* @param c
* a value
*
* @return the average of a, b, and c
*
*/
public static double avg(int a, int b, int c) {
return (a+b+c)/3.0;
}
/**
*
* Returns true if {@code x} is even and false otherwise.
*
*
*
* @param x
* a value
*
* @return true if x is even and false otherwise
*
*/
public static boolean isEven(int x) {
if(x % 2 == 0)
return true;
else
return false;
}
/**
*
* Returns true if {@code units} is not a valid unit for
*
* a temperature and false otherwise. A valid unit
*
* is either the string {@code "C"} (for degrees Celcius)
*
* or the string {@code "F"} (for degrees Fahrenheit).
*
*
*
* @param units
* a string
*
* @return true if units is not a valid unit for
*
* a temperature and false otherwise
*
*/
public static boolean badUnits(String units) {
if(units.equals("C") || units.equals("F"))
return false;
else
return true;
}
/**
*
* Returns true if {@code x} is between the values
*
* {@code lo} and {@code hi}. Returns {@code false}
*
* if {@code x} is equal to {@code lo} or {@code hi}.
*
*
*
* @param x
* a value
*
* @param lo
* a value
*
* @param hi
* a value
*
* @return true if {@code x} is between the values
*
* {@code lo} and {@code hi}
*
*/
public static boolean isInRange(double x, double lo, double hi) {
if(x > lo && x < hi)
return true;
else
return false;
}
/**
*
* Swaps the first and last elements of a list. For example if
*
* {@code t} is the list {@code ["a", "b", "c"]} then swapping the
*
* first and last elements causes {@code t} to become the list
*
* {@code ["c", "b", "a"]}.
*
*
*
* @param t
* a list of strings
*
*/
public static void swapFirstAndLast(List<String> t) {
if(t.size() >= 2){
String temp = t.get(0);
t.set(0, t.get(t.size()-1));
t.set(t.size()-1, temp);
}
}
/**
*
* Returns the number of short words in the given list of strings.
*
* A short word is a string whose length is less than or equal to 2.
*
* This method does not modify the list {@code t}.
*
*
*
* @param t
* a list of strings
*
* @return the number of short words in the given list of strings
*
*/
public static int numShortWords(List<String> t) {
int count = 0;
for(int i =0; i < t.size(); i++){
if(t.get(i).length() <= 2)
count++;
}
return count;
}