小编use*_*587的帖子

Is it possible to create a Java program which recognizes the text in a .txt file and write it in a .csv file? If yes,how would you start with such a problem?

My .txt file is Text1 |Text 2 so I could somehow get the char "|" and split it into two cells.

我可以输入2个数字但是当我为"wahl"(开关)输入一个整数时,结果是错误的.

import java.util.Scanner;


public class taschenrechner {

    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);

        System.out.println("Bitte erste Zahl eingeben:");
        int a = s.nextInt();
        System.out.println("Bitte zweite Zahl eingeben:");
        int b = s.nextInt();

        System.out.println("1.+ \n 2.- \n 3.* \n 4. /");
        int wahl = s.nextInt();

        switch(wahl){
            case 1:
                addieren(a,b);
                break;
            case 2:
                subtrahieren(a,b);
                break;
            case 3:
                multiplizieren(a,b);
                break;
            case 4:
                dividieren(a,b);
                break;
            }
        System.out.println("Bye Bye World");
    }

    private static int addieren(int a, int b){
        int c = a + …