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I’m writing a program to read data from files with various sports statistics. Each line has information about a particular game, in say, basketball. If a particular line contains an “@” symbol, it means that one of the teams is playing at home. I’m trying to count the lines that contain an “@” and output that to the user as the Number of Games in which either team played at home. The first file has that 9 games were played at home for some team, but my output keeps printing out 0 rather than 9. How can I fix this?
Here’s the relevant code:
public static void numGamesWithHomeTeam(String fileName) throws IOException{
File statsFile = new File(fileName);
Scanner input1 = new Scanner(statsFile);
String line = input1.nextLine();
Scanner lineScan = new Scanner(line);
int count = 0;
while(input1.hasNextLine()){
if(line.contains("@")){
count++;
input1.nextLine();
} else{
input1.nextLine();
}
}
System.out.println("Number of games with a home team: " + count);
}
Answer
Your line variable always has the first line’s value. You should set line in the loop, something like that.
while(input1.hasNextLine()){
if(line.contains("@")){
count++;
line = input1.nextLine();
} else{
line = input1.nextLine();
}
Edit: On the second look your code has other problem: the last line is never checked. You should not initialize line (set to null) and do the check after nextLine():
public static void numGamesWithHomeTeam(String fileName) throws IOException{
File statsFile = new File(fileName);
Scanner input1 = new Scanner(statsFile);
String line = null;
Scanner lineScan = new Scanner(line);
int count = 0;
while(input1.hasNextLine()){
line = input1.nextLine();
if(line.contains("@")){
count++;
}
}
System.out.println("Number of games with a home team: " + count);}