Java 需要帮助修复此程序吗

我应该如何编写程序，以便它接受用户的输入并将其分配给可变年龄，然后运行代码

public class Callone 
{
    public void print_det()
    {
        int age = y;
        if(age > 25)
            System.out.println("Not Valid");
        else
            System.out.println("Valid");
     }
    public static void main(String[] args)throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader (System.in));
        System.out.println("Enter the age of the applicant");
        int y = Integer.parseInt(br.readLine());
        Callone c = new Callone();
        c.print_det();
    }
}

---

我看不到您的

y

变量：

int age = y;

您必须使用方法参数传递它：

public class Callone 
{
    public void print_det(int y)
    {
        int age = y;
        if(age > 25)
            System.out.println("Not Valid");
        else
             System.out.println("Valid");
    }
    public static void main(String[] args)throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader (System.in));
        System.out.println("Enter the age of the applicant");
        int y = Integer.parseInt(br.readLine());
        Callone c = new Callone();
        c.print_det(y);
    }
}

为了让它更“甜美”：

没有测试

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Callone {

    public void print_det(int y)
    {
        int age = y;
        if(age > 25)
        System.out.println("Not Valid");
        else
            System.out.println("Valid");
    }
    public static void main(String[] args)throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter the age of the applicant");
        int y = Integer.parseInt(br.readLine());
        Callone c = new Callone();
        c.print_det(y);
    }
}

---

在eclipse中运行时，控制台在暂停用户输入的同时键入数字并按enter键，您应该会看到输出

您在上面的代码中遇到了什么问题？

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Callone {

    public void print_det(int y)
    {
        int age = y;
        if(age > 25)
        System.out.println("Not Valid");
        else
            System.out.println("Valid");
    }
    public static void main(String[] args)throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter the age of the applicant");
        int y = Integer.parseInt(br.readLine());
        Callone c = new Callone();
        c.print_det(y);
    }
}