在对象数组上使用toString [英] Use toString on array of objects

问题描述

import java.io.*;

class Main0
{
    public static void main(String args[])
    {
        String onoma, epitheto, key01;
        short AriMit, EtosEis, AM, key02;
        int i, pos;
        Foititis pinakas[] = new Foititis(3);
        for (i = 0; i < pinakas.length; i++)
        {       
            System.out.println("Ola ta stoixeia na einai taksinomimena symfwna me ton Arithmo Mitroou." + "\n" + "Dwste Onoma.");
            do
            {
                onoma = FUserInput.getString();
                if (onoma == "x")
                    System.out.println("Mh egkyrh timh. Epanalagete");
            } while (onoma == "x");

            System.out.println("Dwste Epitheto.");
            do
            {
                epitheto = FUserInput.getString();
                if (epitheto == "x")
                    System.out.println("Mh egkyrh timh. Epanalagete");
            } while (epitheto == "x");

            System.out.println("Dwste Arithmo Mitrwou.");
            do
            {
                AriMit = FUserInput.getshort();
                if (AriMit == -1)
                    System.out.println("Mh egkyrh timh. Epanalagete");
            } while (AriMit == -1);

            System.out.println("Dwste Etos Eisagwghs.");
            do
            {
                EtosEis = FUserInput.getshort();
                if (EtosEis == -1)
                    System.out.println("Mh egkyrh timh. Epanalagete");
            } while (EtosEis == -1);

            pinakas[i] = new Foititis(onoma, epitheto, AriMit, EtosEis);
        }
        pos = 1;
        System.out.println(Foititis.toString(pos, pinakas));
    }
}

class Foititis      
{
    private String onoma, epitheto;
    private short AriMit, EtosEis;

    public Foititis (String on, String ep, short AM, short EE)
    {
        onoma = on;
        epitheto = ep;
        AriMit = AM;
        EtosEis = EE;
    }

    public String getEpwnymo()      //alles klaseis
    {
        return epitheto;
    }

    public String toString(int j, Foititis b[])
    {
        String emf;
        emf = b[j].onoma;
    }
}

class FUserInput        
 /*dedomenwn kateli3a na xrisimopoihsw thn "FUserInput" gia ola ta dedomena, anti na kanw "catch" to "exception" gia kathe scanner ksexwrista, kathws eixa skopo na xrisimopoihsw mono scanner)*/
{
    static String getString() 
    { 
        String line;
        InputStreamReader eisodosDouble = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(eisodosDouble);
        try
        {
            line = br.readLine();
            return line;
        }
        catch(Exception e) 
        {   
            return "x";
        }
    }

    static short getshort() 
    { 
        String line;
        InputStreamReader eisodosDouble = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(eisodosDouble);
        try
        {
            line = br.readLine();
            short i = Short.parseShort(line);
            return i;
        }
        catch(Exception e) 
        {   
            return -1;
        }
    }
}

任何东西，我不是在问我的字符串方程式，而是在问我想使用的toString方法！！！！

This is not a duplicate of anything, I am not asking about my string equations but about the toString method that I want to use!!!!

所以我有这段代码...是创建对象类型为 Foititis 的对象数组，命名为 pinakas ，并具有四个属性。如果查看名为 Foititis 的类，您会注意到 toString 方法，我要做的就是使用 toString 方法以在屏幕上显示某些内容（在此示例中，它简化为数组对象的 onoma 属性） 。请注意，我还希望发送要显示的数组的特定位置（pos-> j），在此示例中，该位置是固定的（设置为1），但在实际代码中不会。

So I have this code... all it does is to create an array of objects of type Foititis, named pinakas and having the four attributes. If you look at class named Foititis you will notice a toString method, all I want to do is to use the toString method to show something on the screen (at this example it is simplified to the onoma attribute of the array-object). Note that I also want to send the certain position of the array that I want to be seen(pos -> j), at this example the position is fixed (set to 1) but in the actual code it won't.

我尝试编译它，但遇到这两个错误，第二个错误可能是合理的，因为我没有以正确的方式编写代码，但是第一个呢？我又做了同样的事情，没有任何问题（创建对象数组）。

I try to compile it and I get these 2 errors, the second one is probably justified because I haven't written the code in the proper way, but what about the first? I have done the same thing again and I had no problem (at creating an array of objects).

错误

推荐答案

您正在尝试声明一个数组，因此应该是：

You are trying to declare an array, so it should be:

Foititis pinakas[] = new Foititis[3];

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