英文:
Splitting strings as "|" and getting a total
问题
public void checkTotal(){double total_price = 0; // Change data type to double for decimal valuesFile file = new File("ItemUPC.txt"); // Corrected the file pathScanner sc = new Scanner(file);while (sc.hasNextLine()) {String[] line = sc.nextLine().split("\\|"); // Escaped the pipe characterString price = line[2];total_price = total_price + Double.parseDouble(price); // Parse as double}}
请注意，我已经更正了代码中的一些错误：
- 数据类型应该从
int更改为double，以处理包含小数的价格。 - 文件路径应该是
"ItemUPC.txt"而不是ItemUPC.txt"。 - 在
split函数中，我使用了"\\|"来正确转义管道字符。 - 我使用
Double.parseDouble来解析价格字符串为double类型。
这些更正应该能够解决您遇到的问题。
英文:
I have a file:
2|BATH BE|19.00
20312|ORAN|1.42
04520|BOIL|1.78
20000|AV|0.98
2007|.C 312|1.78
0452|ONIOT BOILR H|2.98
2042009|.C |0.98
I want to extract the numbers (19.00,1.42,1.78..) and get a summation out of it.
This is what I have done:
public void checkTotal(){int total_price = 0;File file = new File(ItemUPC.txt");Scanner sc = new Scanner(file);while (sc.hasNextLine()) {String[] line = sc.nextLine().split("[|]");String price = line[2];total_price = total_price + Integer.parseInt(price);}}
I am getting error as: java.lang.NumberFormatException: For input string: "19.00"
Its extracting only the first number it seems.
I want to get a sum of the numbers (19.00+1.42+0.98...likewise)
Any idea where I am getting wrong. Thanks 
答案1
得分: 1
尝试 total_price = total_price + Double.parseDouble(price);
英文:
try total_price = total_price + Double.parseDouble(price);
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