/为什么输不出正确的int型？求答复！谢谢！

你的是读取后转换为data类型了，所以没有正确结果
运行下我的吧
import *;

public class Hello
{
    public static void main(String [] args)
    {
        
        Hello hello = new Hello();
        hello.doRead();
        /*DataInputStream d = new DataInputStream(new BufferedInputStream(System.in));
        int s;
        try{
            s = d.readInt();
            System.out.println(s);
            int b = d.readInt();
            System.out.println(b);
            int sum = s + b;
            System.out.println(sum);
        }catch(IOException e)
        {
            e.printStackTrace();
        }*/
    }
   
    public void doRead(){
        System.out.println("请输入第一个整型数字,回车");
        int numA,numB;
        BufferedReader brKey = new BufferedReader(new InputStreamReader(System.in));
        try {           
            numA = Integer.parseInt(brKey.readLine());
            System.out.println("请再输入一个整型数字，回车");
            numB = Integer.parseInt(brKey.readLine());
            System.out.println("两数之和："+(numA+numB));
            brKey.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println("读取错误，程序已经退出运行");
            System.exit(0);
        }catch(NumberFormatException e){
            System.out.println("请输入整型数字，程序已经退出运行");
            System.exit(0);
        }
    }
}

BufferedReader brKey = new BufferedReader(new InputStreamReader(System.in));
这个是可以！
但我想要的是datainputstream对象输入，这样就不用integer了！

无人啊！

1，2都不行啊！