Question

我是Java的新手，曾经看过这些帖子，但发现示例程序使我难以理解。请提供一个关于如何将ArrayList从一个类传递到另一个类的简单示例，这样我将非常感激，这样我就可以知道发生了什么。

下面我写的示例代码读取一个txt文件（可以是任何字符串字符），我只列出了五种颜色。该程序将它们显示到控制台，但我只想将数组传递给第二个程序

感谢您的指导-让我感到困惑！

//First program that reads in a text file and displays it to the screen
//
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;

// reading a file as a list using ArrayList (1 dim Array)

public class ReadArrayList {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new FileReader("C:\\Users\\user\\IdeaProjects\\test.txt"));
        ArrayList<String> myList = new ArrayList<>();
        String line = null;

        while ((line = br.readLine()) != null) {
            myList.add(line);
        }

//create object of second class to store array values when they get passed to it
//is this correct way - I am not sure?

ClassReceiveArrayA cpa = new ClassReveiveArrayA();


        PassArray(myList);
        br.close();
    }


    public static void PassArray(ArrayList<String> words)
    {
        for (String w : words)
        {

            System.out.println(w);
        }
    }
}

//++++++++++++++++++++++++++++++++++++++++++++++++++
// second program
//
// I want this program to receive the arrayList from class ReadArrayList above
//and display it to the console

import java.util.ArrayList;

// To  receive ArrayList from  ReadArrayList
public class ClassReceiveArrayA {

// can put a for loop here to print array to the screen 
//when  I figure out how to do it!
//



}

将arraylist传递给另一个类（简单示例）

0 个答案: