Object-Oriented Programming with Java, part I + II
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Authors: Arto Hellas, Matti Luukkainen
Translators to English: Emilia Hjelm, Alex H. Virtanen, Matti Luukkainen, Virpi Sumu, Birunthan Mohanathas, Etiënne Goossens
Extra material added by: Etiënne Goossens, Maurice Snoeren, Johan Talboom
The course is maintained by Technische Informatica Breda
Exercise assignments-7-1: Ski Jumping
Once again, you can train to build the program structure yourself; the appearance of the user interface and its functionality are pre-defined.
Note: you can create only one Scanner object lest the tests fail. Also, no not use static variables: the tests execute your program many different times, and the static variable values left from the previous execution would possibly disturb them!
Ski jumping is a beloved sport for Finns; they attempt to land as far as possible down the hill below, in the most stylish way. In this exercise, you create a simulator for a ski jumping tournament.
First, the simulator asks the user for the jumper names. If the user inputs an empty string (i.e. presses enter), we move to the jumping phase. In the jumping phase, the jumpers jump one by one in reverse order according to their points. The jumper with the less points always jumps first, then the ones with more points, till the person with the most points.
The total points of a jumper are calculated by adding up the points from their jumps. Jump points are decided in relation to the jump length (use a random integer between 60-120) and judge decision. Five judges vote for each jump (a vote is a random number between 10-20). The judge decision takes into consideration only three judge votes: the smallest and the greatest votes are not taken into account. For instance, if Mikael jumps 61 meters and the judge votes are 11, 12, 13, 14, and 15, the total points for the jump are 100.
There are as many rounds as the user wants. When the user wants to quit, we print the tournament results. The tournament results include the jumpers, the jumper total points, and the lengths of the jumps. The final results are sorted against the jumper total points, and the jumper who received the most points is the first.
Among the other things, you will need the method
Collections.sortandCollections.reverse. First, you should start to wonder what kind of classes and objects there could be in your program. Also, it would be good to arrive to a situation where your user interface is the only class with printing statements.Kumpula ski jumping week Write the names of the participants one at a time; an empty string brings you to the jumping phase. Participant name: ~~Mikael~~ Participant name: ~~Mika~~ Participant name: The tournament begins! Write "jump" to jump; otherwise you quit: ~~jump~~ Round 1 Jumping order: 1. Mikael (0 points) 2. Mika (0 points) Results of round 1 Mikael length: 95 judge votes: [15, 11, 10, 14, 14] Mika length: 112 judge votes: [14, 12, 18, 18, 17] Write "jump" to jump; otherwise you quit: ~~jump~~ Round 2 Jumping order: 1. Mikael (134 points) 2. Mika (161 points) Results of round 2 Mikael length: 96 judge votes: [20, 19, 15, 13, 18] Mika length: 61 judge votes: [12, 11, 15, 17, 11] Write "jump" to jump; otherwise you quit: ~~jump~~ Round 3 Jumping order: 1. Mika (260 points) 2. Mikael (282 points) Results of round 3 Mika length: 88 judge votes: [11, 19, 13, 10, 15] Mikael length: 63 judge votes: [12, 19, 19, 12, 12] Write "jump" to jump; otherwise you quit: ~~quit~~ Thanks! Tournament results: Position Name 1 Mikael (388 points) jump lengths: 95 m, 96 m, 63 m 2 Mika (387 points) jump lengths: 112 m, 61 m, 88 m