這是我根據運動創建的一個測驗，它提出了一系列問題，用戶每次嘗試 3 次。從那里它匯總每個玩家的分數并以二維數組的形式顯示，它比較分數并打印最高分數。我將如何使用冒泡排序（不是 array.sort）按第二個索引（分數）對二維數組（記分板）進行排序。import java.util.*;class miniproj{ public static void main(String[] args) { Questions[] questions = setQuestions(); // store array of questions using setquestions method askQuestion(questions); // run method askquestion using questions parameter (array) } public static Questions[] setQuestions() { Questions[] questions = new Questions[4]; //create array of type questions Questions A = new Questions(); // create new questons type called A A.question = "What team won the world cup in 1966?"; A.options = " A. Germany\n B. France\n C. England\n D. Wales"; A.answer = "C"; questions[0] = A; // the first question in the aray is A Questions B = new Questions(); B.question = "Who are the current EPL title holders?"; B.options = " A. Arsenal\n B. Bournemouth\n C. Chelsea\n D. Manchester City"; B.answer = "D"; questions[1] = B; Questions C = new Questions(); C.question = "Who is the current Golden Boot holder 2017/18 season?"; C.options = " A. Lionel Messi\n B. Harry Kane\n C. Cristiano Ronaldo\n D. Davidson Sanchez"; C.answer = "A"; questions[2] = C; Questions D = new Questions(); D.question = "Which team has most goals"; D.options = " A. Arsenal\n B. Bournemouth\n C. Chelsea\n D. Manchester City"; D.answer = "A"; questions[3] = D; return questions; // return array of questions } public static void askQuestion(Questions[] array) { int correct = 0; Scanner sc = new Scanner(System.in); String[][] scoreboard = new String[4][2]; for(int m = 0; m < scoreboard.length; m++) { correct = 0; System.out.println("What is your name"); scoreboard[m][0] = sc.nextLine();
2 回答
翻閱古今
TA貢獻1780條經驗 獲得超5個贊
如果我理解正確，你有一個像這樣的二維數組結構：
{name,score}
{name,score}
{name,score}
{name,score}
并且您想根據第二列進行排序：分數。
與其在二維數組中實現它，不如創建一個名為 Player 的對象
Player 有一個實現：
public class Player{
private String name;
private int score;
Player(String name){
this.name = name;
}
public void setScore(int score){
this.score = score;
}
public int getScore(){
return score;
}
}
現在您的記分牌現在可以實現為一個一維數組，如下所示：
Player[] scoreboard = new Player[playerSize];
更容易理解和閱讀。
現在要對該數組進行排序，您可以實現一個自定義類，該類允許您比較兩個 Player 類型的對象
class comparePlayer implements Comparator<Player>{
public int compare(Player a, Player b) {
if (a.getScore() < b.getScore()){
return -1;
}
else if (a.getScore() == b.getScore()){
return 0;
}
else{
return 1;
}
}
}
現在你可以像這樣按分數排序 ->
Arrays.sort(scoreboard,new comparePlayer());
或者如果你真的想使用冒泡排序，那么你可以像這樣實現它：
int length = scoreboard.length;
for (int i = 0; i < length-1; i++){
for (int j = 0; j < length-i-1; j++){
if (scoreboard[j].getScore() > scoreboard[j+1].getScore()){
Player temp = scoreboard[j];
scoreboard[j] = scoreboard[j+1];
scoreboard[j+1] = temp;
}
}
}
白板的微信
TA貢獻1883條經驗 獲得超3個贊
在這種情況下，您可以通過修改來實現冒泡排序以比較重要的值。例子：
static void bubbleSort(String[][] arr) {
int arrayLength = arr.length;
for (int i = 0; i < arrayLength; i++) {
for (int j = 1; j < (arrayLength - i); j++) {
String nameTemp, scoreTemp;
int leftValue, rightValue;
leftValue = Integer.valueOf(arr[j - 1][1]);
rightValue = Integer.valueOf(arr[j][1]);
if (leftValue > rightValue) {
//swap elements
nameTemp = arr[j - 1][0];
scoreTemp = arr[j - 1][1];
arr[j - 1][0] = arr[j][0];
arr[j - 1][1] = arr[j][1];
arr[j][0] = nameTemp;
arr[j][1] = scoreTemp;
}
}
}
}
然后好吧，你想要數組的最后一個索引，因為它是升序排序的。
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