英文:
Java - Error starting program with arguments in console
问题
以下是您要求的翻译内容：
一般情况下，不涉及水。输入是以CSV格式表示的链接（文件路径），每行（数组）应输出。为了方便起见，我下载了一个第三方库来处理CSV文件。通过命令行运行。编译顺利，做了一切正确的事情（某种程度上），注册了库的路径等：
E:\projects\java.Adam2.0\src\com\company>javac -cp "E:\projects\Librari\opencsv-5.2.jar" QI100.java
E:\projects\java.Adam2.0\src\com\company>cd E:\projects\java.Adam2.0\src
我运行了（就像...我不太确定了），正确地指定了参数（文件路径），但是它给出了以下错误：
E:\projects\java.Adam2.0\src>java QI100 C:\Users\ARTHUR\Downloads\file.csv
错误：
错误：找不到或加载主类 QI100
原因：java.lang.ClassNotFoundException: QI100
忘记了代码本身：
package com.company;
import com.opencsv.CSVReader;
import com.opencsv.exceptions.CsvValidationException;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class QI100 {
public void main (String[] args) throws IOException, FileNotFoundException, CsvValidationException {
String pathToFile = args[0];
BufferedReader reader = new BufferedReader(new FileReader(pathToFile));
CSVReader csvReader = new CSVReader(reader);
ArrayList<String[]> lineArray = new ArrayList<>();
String[] line;
while ((line = csvReader.readNext()) != null) {
lineArray.add(line);
System.out.println(line);
}
}
}
如果您有任何其他需要翻译的内容，请随时提问。
英文:
In general, no water. The input is a link (path to the file) in CSV format, each line (array) should be output. For convenience, I downloaded a third-party library to work with CSV files. Running through the command line. Compiles well, did everything right (sort of), registered the path to the library, etc .:
E:\projects\java.Adam2.0\src\com\company>javac -cp "E:\projects\Librari\opencsv-5.2.jar" QI100.java
E:\projects\java.Adam2.0\src\com\company>cd E:\projects\java.Adam2.0\src
I run (like ... I'm not sure here anymore) correctly, specifying the argument (path to the file), but it gives the following error:
E:\projects\java.Adam2.0\src>java QI100 C:\Users\ARTHUR\Downloads\file.csv
ERROR:
Error: Could not find or load main class QI100
Caused by: java.lang.ClassNotFoundException: QI100
Forgot about the code itself:
package com.company;
import com.opencsv.CSVReader;
import com.opencsv.exceptions.CsvValidationException;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class QI100 {
public void main (String[] args) throws IOException, FileNotFoundException, CsvValidationException {
String pathToFile = args[0];
BufferedReader reader = new BufferedReader(new FileReader(pathToFile));
CSVReader csvReader = new CSVReader(reader);
ArrayList<String[]> lineArray = new ArrayList<>();
String[] line;
while ((line = csvReader.readNext()) != null) {
lineArray.add(line);
System.out.println(line);
}
}
}
答案1
得分: 0
你已经在E:\projects\java.Adam2.0\src\com\company处编译了Java文件，而你正试图在E:\projects\java.Adam2.0\src处访问它。因此，系统无法找到这个类。请使用以下命令：
E:\projects\java.Adam2.0\src>javac -d . -cp "E:\projects\Librari\opencsv-5.2.jar" QI100.java
E:\projects\java.Adam2.0\src>java -cp "E:\projects\Librari\opencsv-5.2.jar" com.company.QI100 C:\Users\ARTHUR\Downloads\file.csv
注意： . 指定了当前目录，而开关 -d 指定了生成的类文件存放的位置。要了解更多信息，只需使用命令 javac。
英文:
You have compiled the Java file at E:\projects\java.Adam2.0\src\com\company while you are trying to access it at E:\projects\java.Adam2.0\src. Therefore, the system is not able to find the class. Use the command as follows:
E:\projects\java.Adam2.0\src>javac -d . -cp "E:\projects\Librari\opencsv-5.2.jar" QI100.java
E:\projects\java.Adam2.0\src>java -cp "E:\projects\Librari\opencsv-5.2.jar" com.company.QI100 C:\Users\ARTHUR\Downloads\file.csv
Note: The . specifies the current directory and the switch -d specifies where to place generated class files. To learn more about it, just use the command, javac.
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