Question

我正在尝试将String值传递给接受字符串的方法，但是我收到错误“不兼容的类型”。我已经尝试过对一个int值进行硬编码，看看它给出的错误是什么：

找到int; required：java.lang.String。

将方法更改为接受文件而不是错误：

找到String;必需：java.io.File。

ergo，我正在喂一个字符串应该是的字符串。但我不明白我哪里错了。（我已将其更改回Feed String并接受String）

欢迎任何反馈。提前谢谢：）

import java.io.*;
import java.util.*;
public class Test
{
    private ArgsReader inputFile;
    private String filename;
    private List<Pallet> entryBayQueue;
    /**
     * Constructor for objects of class Test
     */
    public Test()
    {
        inputFile = new ArgsReader();
        entryBayQueue = new LinkedList();
    }

    /**
     * methods
     */
    public void run(String[] args)
    {
        if(args.length > 0) //launched if you gave an argument
        {
            String line;
            filename = args[0];
            System.out.println(filename.getClass().getSimpleName()); //outputs string


            line = inputFile.stringFileReader(filename); //call method containing reading capability to read and store contents in line

            // ******* here is where the error occurs

            //System.out.println(line); //line = null here
            StringTokenizer st = new StringTokenizer(line);//tokenize line's contents
            while(st.hasMoreTokens())
            {
                System.out.println(st.nextToken());
                int serialNum = 0;
                switch(st.nextToken())
                {
                    case "A": 
                        {
                            serialNum++;
                            Pallet almondPallet = new Pallet(1,serialNum); //create new almond pellet and assign serial number
                            entryBayQueue.add(almondPallet); //adds pallet to the end of the list
                            break;
                        }
                }
            }

        }
        else //launched when you didn't provide an argument
        {
            filename = null;
            Console console = System.console();
            filename = console.readLine("file to read from: ");
            inputFile.stringFileReader(filename); //call method containing reading capability
        }
    }
}

// ******this is the implementation of stringFileReader

public void stringFileReader(String filename)
    {
        try
        {            
            input = new FileReader(filename); //open file for reading (string filename)
            buffReader = new BufferedReader(input); // read a line at a time

            line = buffReader.readLine(); //read 1st line
            while (line != null)
            {
                lineNum++;
                System.out.println(line);
                line = buffReader.readLine(); //read next line
            }

        }
        catch (IOException e){System.out.println("caught IOException");}

Answer 1

public void stringFileReader(String filename)

应该是

public String stringFileReader(String filename)

当期待调用时，

方法没有返回值。

感谢任何帮助过的人。

向需要String的方法提供String时出现不兼容的类型错误

1 个答案: