java - 找不到符号 System.console().readInt();

Question

这个问题已经有答案了:

How to get the user input in Java? (29 个回答)

已关闭 7 年前。

这是我的代码:

import java.io.PrintWriter;
import java.io.FileNotFoundException;

public class Main {
public static void main(String[] args) throws FileNotFoundException {

    String enter = "Enter";
    String resolve = "Resolve";
    String store = "Store";

    // if file doesn't exist
    int nextjob = 1;
    int jobnumber = nextjob;
    int phonenumber = System.console().readInt();
    int numberoflines = System.console().readInt();
    String problem = System.console().readLine();
    int time = System.console().readInt();

    String command = System.console().readLine();
    if(command.equals(store)){
        PrintWriter writer = new PrintWriter("openjobs.txt");
        writer.println(nextjob);
        writer.println(jobnumber);
        writer.println(phonenumber);
        writer.println(numberoflines);
        writer.println(problem);
        writer.println(time);
        writer.close();
    }
  }
}

这是输出:

Main.java:14: error: cannot find symbol
        int phonenumber = System.console().readInt();
                                          ^
symbol:   method readInt()
location: class Console

Answer 1

使用Scanner和 Scanner.nextInt()方法仅将整数作为用户的输入。

Scanner sc = new Scanner(System.in);
int anyNumber = sc.nextInt();

如果用户输入的不是整数，则会抛出InputMismatchException .