eecs2030.test2

Class Test2E

java.lang.Object

eecs2030.test2.Test2E

public class Test2E
extends Object

Test 2 version E.

Author:

EECS2030E Fall 2016

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_DIGITS The maximum number of digits in a Java int.

Method Summary

Modifier and Type	Method and Description
static List<Integer>	allGreaterThan(List<Integer> t, int max) Returns a new list containing all of the values in the given list t greater than max.
static double	avg(int a, int b, int c) Computes the average value of three numbers.
static void	swap2(List<Integer> t) Given a list containing exactly 2 integers, swaps the positions of the integers in the list.
static int	toInt(List<Integer> t) Given a list t whose elements are single digits, returns the int value formed by joining the digits.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_DIGITS

public static final int MAX_DIGITS

The maximum number of digits in a Java int.

See Also:

Constant Field Values

Method Detail

avg

public static double avg(int a,
                         int b,
                         int c)

Computes the average value of three numbers.

Parameters:

a - a number

b - a number

c - a number

Returns:

the average of a, b, and c

swap2

public static void swap2(List<Integer> t)

Given a list containing exactly 2 integers, swaps the positions of the integers in the list. For example, given a list

[-5, 9]

swap2 modifies the list so that it becomes

[9, -5]

Parameters:

t - a list containing exactly 2 integers

Throws:

IllegalArgumentException - if the list does not contain exactly 2 integers

Precondition:

t is not null

allGreaterThan

public static List<Integer> allGreaterThan(List<Integer> t,
                                           int max)

Returns a new list containing all of the values in the given list t greater than max. An empty list is returned if no value in t is greater than max. The list t is not changed by this method. For example, if max == 5 then:

 t                    Test2E.allGreaterThan(t, max)
 --------------------------------------------------
 []                   []
 [4]                  []
 [9]                  [9]
 [4, 5, 6, 7, 8]      [6, 7, 8]
 

Parameters:

t - a list of values

max - all values in the returned list will be greater than max

Returns:

a new list containing all of the values in t that are greater than max

Precondition:

t is not null

toInt

public static int toInt(List<Integer> t)

Given a list t whose elements are single digits, returns the int value formed by joining the digits. The list t is not changed by this method. For example, here are some lists and their corresponding int values:

 []  (the empty list)          0
 [4]                           4
 [5, 2]                        52
 [8, 7, 3]                     873
 [-1, 0, 0, 0]                -1000
 

If joining the digits of the list produces a positive value greater than Integer.MAX_VALUE then Integer.MAX_VALUE is returned.

If joining the digits of the list produces a negative value less than Integer.MIN_VALUE then Integer.MIN_VALUE is returned.

Parameters:

t - a list of digits

Returns:

the int value corresponding to the digits in t

Precondition:

t is not null, the elements of t are integers consisting of exactly one digit, the first element of t may be negative or positive, but not zero, all elements except the first are positive or zero