Java，在其他地方使用数组中的字符串？

Question

我是编码新手。我正在做一个项目，但我被困住了。我的代码从文本文件中读取句子。它分隔句子并获取第二个单词并将其记录在数组中。我需要在其他地方使用这个词，但我做不到。

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Classroom {
    private String classname;

    public String getClassname() {
        return classname;
    }

    public void setClassname(String classname) {
        this.classname = classname;
    }

    public void classroomreader(String filename) {
        // This method gets the name for Classroom
        File text = new File("C:/classlists/" + filename + ".txt");
        Scanner scan;
        try {
            scan = new Scanner(text);
            String line = scan.nextLine();
            String classroomarray[] = line.split("\t");
            // ** right now classroomarray[1] has the word which I want.**

        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }
    }
}

这是我的主要类(class):

public class ProjectMain {
    public static void main(String[] args) {
        // I created an array with 3 Classroom object inside it.
        Classroom[] classarray = new Classroom[3];

        //I hope I did this correct.

        // I used classroomreader method on my first object.
        classarray[0].classroomreader("class1"); 

        // Now I need to use the word in classroomarray[1].
        classarray[0].setClassname(????)
    }
}

我尝试过:classarray[0].setClassname(classroomarray[1]);但它给出了一个错误。如何为我的第一个对象设置名称？

Answer 1

我只对你的代码做了一些更改..试试这个....这肯定会起作用

    class Classroom {
private String classname;
String classroomarray[]=null;//declare  classroomarray[] here 

public String getClassname() {
    return classname;
}

public void setClassname(String classname) {
    this.classname = classname;
}

public void classroomreader(String filename) {

    File text = new File("C:/classlists/" + filename + ".txt");
    Scanner scan;
    try {
        scan = new Scanner(text);
        String line = scan.nextLine();
         classroomarray = line.split("\t");


    } catch (FileNotFoundException e1) {
        e1.printStackTrace();
    }
}

}

类项目主{ 公共(public)静态无效主(字符串[]参数){

        Classroom[] classarray = new Classroom[3];


        //here you need to initialize all elements of the array
        classarray[0]=new Classroom();
        classarray[1]=new Classroom();
        classarray[2]=new Classroom();

        classarray[0].classroomreader("class1"); 


        classarray[0].setClassname(classarray[0].classroomarray[1]);

        System.out.println(classarray[0].getClassname());// here you'll surely get the the desired results
    }
}