Control - Conditionals B

Control - Conditionals

• if
• else
• boolean expressions
• nested if
• if-else-if

IfExamples.java
Condition.java
Bunny.java.

Deitel 4.1-4.7

Classwork

Create a project  and a class with a main method, TestCollectors.

Part A

☑ Add new class, Collector, which has an int instance variable collected, to keep track of how many of something they collected, another available, for how many of that thing exist, and a boolean completist, which is true if we want to collect everything, or false if we don't care about having the complete set.

☑ Write a toString for this class as follows:

If there are more objects collected than are available, the result should be something like

an overflowing collection with 20 out of 15 items

if  there are exactly the same number collected as available

a perfect collection with 15 out of 15 items

if there are fewer collected than are available, it depends whether we are being completist, so either

a sadly incomplete collection with 10 out of 15 items

or

a collection with 10 out of 15 items

☑ [EC +10] Actually, if the number available is 0, no matter how many are collected, the result should be

not really a collection at all

adjust your toString accordingly

☑ In your main, create several Collectors with different values and check that their toStrings come out correctly

Part B

Create another class OrderNums, also with a main.  We will be using the Scanner class to read from the user. At the top, after the package statement, paste

import java.util.Scanner;

Scanner scan = new Scanner(System.in);

 ☑ In main,  ask the user for a value for each of  three int variables x, y, and z.

 ☑ Using conditionals with logical operators, print the three ints back out in decreasing order.  (You can ignore the case where two numbers are the same)

So whether you were given 2, 1, 3,  or 1,2,3 or 3,1,2, you'd print out 3, 2, 1.

You may add extra variables (i.e. small, med, and large) if you wish.

Make sure you test all possible orders for the three numbers.