嗨，我正在尝试运行一个简单的奇偶程序，但它给了我错误“预期标识符”[重复]

Question

您好，我正在尝试运行一个简单的奇偶程序，但它给我的错误“预期标识符”程序如下：

import.java.io.*;

public class OddevenbufferedReader {
  System.output.println("Enter a number to be checked as odd or even: ");
  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

  public static void main(String args[]) {
    int num, output;
    num = Integer.parseInt(br.readLine());
    output = num % 2;
    if (output == 0) {
      System.out.println("Entered number is even");
    } else {
      System.out.println("Entered number is odd");
    }
  }
}

Answer 1

删除import和java.io.*;之间的.

import java.io.*;

并将System.output.println 和BufferedReader br 行放在main 方法中。

Answer 2

您的程序存在多个问题

1. 导入语法不正确。

   import.java.io.*;

应该是

import java.io.*;

1. System.output 应该更正

   System.output.println("Enter a number to be checked as odd or even: ");

应该是

System.out.println("Enter a number to be checked as odd or even: ");

1. 输出语句应该出现在方法块中。并且应该处理缓冲读取器抛出的异常，即将 main 方法更新为

主要方法

public static void main(String args[]) {
    System.out.println("Enter a number to be checked as odd or even: ");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    int num, output;
    try {
        num = Integer.parseInt(br.readLine());
        output = num % 2;
        if (output == 0) {
            System.out.println("Entered number is even");
        } else {
            System.out.println("Entered number is odd");
        }
    } catch (NumberFormatException | IOException e) {
        e.printStackTrace();
    }
}