Question

我正在尝试写一个文件（leaders.txt），我遇到的问题是我计算的数据在文件中的显示方式。

import java.io.*;
import java.util.*;
public class readStats {
public static int getStat(String letter, String stats) {
    int count = stats.length() - stats.replace(letter, "").length();

    return count;
}

public static void main(String[] args) throws FileNotFoundException {
    String hitsLeader = null;
    String walksLeader = null;
    String hitsByPitchLeader = null;
    String strikeoutsLeader = null;
    String battingAverageLeader = null;
    int maxHits        = 0;
    int maxWalks       = 0;
    int maxHitsByPitch = 0;
    int maxStrikeouts  = 0;
    int maxBa          = 0;

    java.io.File file = new java.io.File("stats.txt");
    Scanner input = new Scanner(file);

    //Find out number for each category
    while (input.hasNextLine()) {
        String line = input.nextLine();
        String[] parts  = line.split(" ");
        int hits        = getStat("H", parts[1]);
        int outs        = getStat("O", parts[1]);
        int walks       = getStat("W", parts[1]);
        int hitsByPitch = getStat("P", parts[1]);
        int strikeouts  = getStat("K", parts[1]);
        int sacrifices  = getStat("S", parts[1]);
        int totalAtBats = hits + outs + strikeouts;
        double ba = ((double)hits/(double)totalAtBats );

        //System.out.println("Player " + parts[0]);       

        if (hits > maxHits) {
            maxHits = hits;
            hitsLeader = parts[0];
        }


        if (walks > maxWalks) {
            maxWalks = walks;
            walksLeader = parts[0];
        }

        if (hitsByPitch > maxHitsByPitch) {
            maxHitsByPitch = hitsByPitch;
            hitsByPitchLeader = parts[0];
        }

        if (strikeouts > maxStrikeouts) {
            maxHits = hits;
            strikeoutsLeader = parts[0];
        }            

        if (ba > maxBa) {
            maxHits = hits;
            battingAverageLeader = parts[0];
        }

        //Create PrintWriter
        java.io.PrintWriter output = new java.io.PrintWriter("leaders.txt");

        // Print LEAGUE LEADERS to leaders.txt
        output.println(parts[0]);
        output.printf("BA: %.3f", ba);
        output.println("H: " + hits);
        output.println("BB: " + walks);
        output.println("K: " + strikeouts);
        output.println("HBP: " + hitsByPitch);
        output.println("");
        output.println("LEAGUE LEADERS");
        output.println("BA: " + battingAverageLeader);
        output.println("H: " + hitsLeader);
        output.println("BB: " + walksLeader);
        output.println("K: " + strikeoutsLeader);
        output.println("HPB: " + hitsByPitchLeader);
        output.close();
    }

}
}

leaders.txt中的输出

Pudge
BA: 0.450H: 9
BB: 2
K: 8
HBP: 1

LEAGUE LEADERS
BA: Pudge
H: Piazza
BB: Griffey
K: Pudge
HPB: Griffey

Stats.txt

Griffey HHOHOKWOHKSPOOWSHHWWWWWWW
Piazza OOHHHKPSOHOOHWWHOSSSHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Pudge HHHHKOOHHHSWWHHOPKKKKKKK

所需输出

Griffey
BA: 0.462
H: 6
BB: 9
K: 2
HBP: 1

Piazza
BA: 0.833
H: 35
BB: 2
K: 1
HBP: 1

Pudge
BA: 0.450
H: 9
BB: 2
K: 8
HBP: 1

我需要输出来显示文件stats.txt中关联的所有三个玩家，而不仅仅是一个。

Answer 1

在while循环之前启动打印机，然后关闭它联盟领导人应该只打印一次。当你比较每个玩家的数量时，在循环之后移动那些。

java.io.PrintWriter output = new java.io.PrintWriter("leaders.txt");
while (input.hasNextLine()) {
...
}
output.println("LEAGUE LEADERS");
output.println("BA: " + battingAverageLeader);
output.println("H: " + hitsLeader);
output.println("BB: " + walksLeader);
output.println("K: " + strikeoutsLeader);
output.println("HPB: " + hitsByPitchLeader);
output.close();

修改：添加

output.println();

之后

output.printf("BA: %.3f", ba);

printf无法开始换行。

写入Java中的文件错误

1 个答案: