我不知道如何从文本文件中提取每个标记(以获取工具字段的每个值)以创建相应的工具对象以添加到工具列表(工具数组列表)中。我要做的是:
...
if it's not a comment or a blank line
create a second scanner passing it lineOfText
create a Tool object
pass the scanner to a new readData() method of the Tool
class & read data for each of its fields
store the Tool object in toolList
...
这是我当前的扫描仪代码:
try (Scanner scanner = new Scanner(new File(filePathAbsolute)))
{
while (scanner.hasNextLine())
{
String lineOfText = scanner.nextLine();
if (lineOfText.startsWith("//") || lineOfText.isEmpty())
{
continue;
}
System.out.println(lineOfText);
Scanner scanner2 = new Scanner(lineOfText).useDelimiter(",");
while (scanner2.hasNext())
{
String[] tokens = scanner.next().split(",");
}
}
scanner.close();
我应该从中提取的文本文件(无法编辑任何内容):
// this is a comment, any lines that start with //
// (and blank lines) should be ignored
// data is toolName, itemCode, timesBorrowed, onLoan, cost, weight
Makita BHP452RFWX,RD2001,12,false,14995,1800
Flex Impact Screwdriver FIS439,RD2834,14,true,13499,1200
DeWalt D23650-GB Circular Saw, RD6582,54,true,14997,5400
Milwaukee DD2-160XE Diamond Core Drill,RD4734,50,false,38894,9000
Bosch GSR10.8-Li Drill Driver,RD3021,25,true,9995,820
Bosch GSB19-2REA Percussion Drill,RD8654,85,false,19999,4567
Flex Impact Screwdriver FIS439, RD2835,14,false,13499,1200
DeWalt DW936 Circular Saw,RD4352,18,false,19999,3300
Sparky FK652 Wall Chaser,RD7625,15,false,29994,8400
你做一件事情太多了,要么你使用定界符,要么你手动拆分线,如果你需要扫描 2 个不同的东西,你可以完全重复使用同一个扫描仪:
try (Scanner scanner = new Scanner(new File(filePathAbsolute)))
{
while (scanner.hasNextLine())
{
String lineOfText = scanner.nextLine();
if (lineOfText.startsWith("//") || lineOfText.isEmpty())
{
continue;
}
System.out.println(lineOfText);
String[] tokens = lineOfText.split(",");
}
// scanner.close();
// Closing your scanner is actually redundant as try-with-resources is already closing your resources automatically at the end of the block