java类在同一个包中找不到其他类 [英] A java class can't find an other in the same package

问题描述

我在ubuntu中实现了一个java程序，没有IDE将货币转换成€，我有两个类ConvertiEuro和Valuta都在同一个目录（包）中称为finanza，类ConvertiEuro使用类Valuta，当我尝试编译Valuta.java它正确编译，但当我编译ConvertiEuro.java时，我得到一个错误说ConvertiEuro.java:3：错误：找不到符号我不知道为什么这里是代码

I am implementing a java program in ubuntu without an IDE that converts a currency to €, i have 2 classes ConvertiEuro and Valuta both in the same directory (package) called finanza, the class ConvertiEuro uses the class Valuta, when i try to compile Valuta.java it compiles correctly but when i compile ConvertiEuro.java I get an error saying "ConvertiEuro.java:3: error: cannot find symbol" I don't know why here is the code

  package finanza;

   public class Valuta {

     private String nomeValuta;
     private double totValuta;



    public Valuta(String nomeVal, double totVal) {

             nomeValuta = nomeVal;
             totValuta = totVal;
   }

       public String getNomeValuta() {

          return nomeValuta;    
       }

        public double getTotValuta() {
          return totValuta;     
   }

}

package finanza;

 import finanza.Valuta;

 public class ConvertiEuro {


private int valuteGestibili;
private int cont = 0;
private Valuta [] valutas;



public ConvertiEuro(int valuteGest) {

    this.valuteGestibili = valuteGest;
    this.valutas = new Valuta [this.valuteGestibili];


}
public boolean impostaValuta(Valuta val){


    if(cont<valuteGestibili) {
        this.valutas[cont] = val;
        cont ++;
        return true; 

    }
    else {
        return false;
    }   

}

}

以及我如何编译：javac ConvertiEuro.java

and this how I compile: javac ConvertiEuro.java

推荐答案

我强烈怀疑问题在于你的编译方式。

I strongly suspect the problem is in how you're compiling.

两者 ConvertiEuro.java 和 Valuta.java 应该在一个名为 finanza 的目录中，理想情况下应该从父目录编译，以便所有编译器都知道在哪里找到其他代码相同的包裹。对于名为期望在您当前所在的目录下的 finanza 目录中查找源文件> finanza 。

Both ConvertiEuro.java and Valuta.java should be in a directory called finanza, and you should ideally compile from the parent directory, so that all the compiler knows where to find other code in the same package. It would expect to find a source file in a finanza directory under the one you're currently in, for a package called finanza.

最简单的方法是同时编译所有文件：

It's simplest just to compile all the files at the same time though:

javac finanza/*.java

..或者更好的是，使用IDE来管理这类事情。

... or better yet, use an IDE which will manage this sort of things for you.

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