我正在创建一个程序，该程序涉及用户必须以特定格式输入有关游戏的数据，他们将输入几条信息，然后我必须向他们显示这些信息，包括总得分和他们玩游戏的总时间输入。我目前正在使用数组来存储信息，但我无法弄清楚如何添加他们给我的所有数据。这就是我到目前为止所做的。
//setting up my array.
myArray = input.split(":");
score = Integer.parseInt(myArray[1]);
timePlayed = Integer.parseInt(myArray[2]);
这是我设置阵列分割器。
do {
numGames++;
System.out.println("Enter game information seperated with colons. Example - Game:Score:Mins");
input = scanner.nextLine();
这是我提示用户以我要求的格式输入数据的地方。这将重复进行，直到他们进入“退出”或达到20的游戏限制。
}while (!input.equalsIgnoreCase("quit") && numGames <20);
System.out.println("Player: " + player );
System.out.println("- - - - - - - - - - - - -");
System.out.println("Games played: " + numGames + ", " + "Score: " + score + ", " + "Time played: " + timePlayed);
然后我希望信息显示如下，但是当我运行我的程序时，它并没有累计合并的游戏时间，游戏数量有效，但得分和时间没有。
很抱歉，如果格式不正确，因为这是我的第一篇文章！如果你们需要我的程序中的任何更多信息或代码来帮助我告诉我，我会尝试！谢谢你！ ：）
请求完整代码：
String input;
String player;
int score;
int timePlayed;
float scores;
float time;
Scanner scanner = new Scanner (System.in);
int numGames = 0;
System.out.print("Enter your name: ");
player = scanner.nextLine();
//If the player does not enter a name they are them prompted to do so again until they have.
while (player.isEmpty())
{
System.out.print("Enter your name: ");
player = scanner.nextLine();
}
String[] myArray = new String [2];
//This section is prompting the player to input game data in a format requested.
do {
numGames++;
System.out.println("Enter game information seperated with colons. Example - Game:Score:Mins");
input = scanner.nextLine();
//If the player does not enter any information then this piece of code will run and ask them to do so.
while (input.isEmpty())
{
System.out.println("Enter game information seperated with colons. Example - Game:Score:Mins");
input = scanner.nextLine();
}
//setting up my array.
myArray = input.split(":");
score = Integer.parseInt(myArray[1]);
timePlayed = Integer.parseInt(myArray[2]);
//This displays to the player what they have just entered.
System.out.println("Player: " + player );
System.out.println("- - - - - - - - - - - - -");
System.out.println("Games played: " + numGames + ", " + "Score: " + score + ", " + "Time played: " + timePlayed);
input = scanner.nextLine();
try{
scores = Float.parseFloat(myArray[1]);
time = Float.parseFloat(myArray[2]);
}
catch (NumberFormatException e) {
System.out.println("Error: invalid input, not a number" + e.getMessage());
}
input = scanner.nextLine();
score.add(myArray[0]);
}while (!input.equalsIgnoreCase("quit") && numGames <2);
System.out.println("Player: " + player );
System.out.println("- - - - - - - - - - - - -");
System.out.println("Games played: " + numGames + ", " + "Score: " + score + ", " + "Time played: " + myArray[2]);
System.out.println("Exit");
scanner.close();
答案 0 :(得分：0)
尝试删除第一个player = scanner.nextLine();
并替换此while循环：
while (player.isEmpty())
使用：
while (scanner.hasNextLine()){
...
答案 1 :(得分：0)
最好使用存储三个参数的Model类来完成此操作。但是，如果您想通过使用分隔符（:）拆分输入行来使用临时数组，这是一个有效的示例;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
public class TestAnswer2 {
public static final String SEPARATOR = ":";
public static void main(String[] args) {
List<String[]> dataList = new LinkedList<String[]>();
String[] tempStringArray = null;
String playerName = null;
Scanner scanner = new Scanner(System.in);
String input = "";
// If the player does not enter a name they are them prompted to do so
// again until they have.
while (playerName == null || playerName.isEmpty()) {
System.out.print("Enter your name: ");
playerName = scanner.nextLine();
}
boolean shouldContinue = true;
while ( shouldContinue ) {
System.out.println("Enter game information seperated with colons. Example - Score:Mins");
input = scanner.nextLine();
tempStringArray = input.split(SEPARATOR);
if(tempStringArray.length == 1) {
if( tempStringArray[0].equalsIgnoreCase("quit") ) {
shouldContinue = false;
}
} else if (tempStringArray.length == 2) {
System.out.println("Entered>> Score: " + tempStringArray[0] + ", Time: " + tempStringArray[1] );
dataList.add(tempStringArray);
} else {
System.out.println("Please Re-Enter game information seperated with colons. Example - Score:Mins");
}
}
System.out.println("Player: " + playerName );
for(int i = 0; i < dataList.size(); i++) {
System.out.println("- - - - - - - - - - - - -");
System.out.println("Game Index: " + (i+1) + ", " + "Score: " + dataList.get(i)[0] + ", " + "Time played: " + dataList.get(i)[1]);
}
scanner.close();
}
}
输出;
Enter your name: Levent
Enter game information seperated with colons. Example - Score:Mins
56:4
Entered>> Score: 56, Time: 4
Enter game information seperated with colons. Example - Score:Mins
112:7
Entered>> Score: 112, Time: 7
Enter game information seperated with colons. Example - Score:Mins
43:5
Entered>> Score: 43, Time: 5
Enter game information seperated with colons. Example - Score:Mins
366:12
Entered>> Score: 366, Time: 12
Enter game information seperated with colons. Example - Score:Mins
quit
Player: Levent
- - - - - - - - - - - - -
Game Index: 1, Score: 56, Time played: 4
- - - - - - - - - - - - -
Game Index: 2, Score: 112, Time played: 7
- - - - - - - - - - - - -
Game Index: 3, Score: 43, Time played: 5
- - - - - - - - - - - - -
Game Index: 4, Score: 366, Time played: 12
您应该注意到游戏索引会自动增加，而链接列表只会存储用于存储分数和时间变量的数组。
希望它有所帮助。