Unable to compile through command prompt

Question

import java.io.DataInputStream;

class Reading{

    public static void main(String ar[]) throws Exception {
        DataInputStream din = new DataInputStream(System.in);

        int intNumber = 0;
        float floatNumber = 0.0f;

        System.out.println("Enter integer and float number");

        intNumber = Integer.parseInt(din.readLine());
        floatNumber = Float.valueOf(din.readLine()).floatValue();

        System.out.println("Integer" + intNumber);
        System.out.println("Float" + floatNumber);
    }
}

/* Output

Note: Reading.java uses or overrides a deprecated API.

Note: Recompile with -Xlint:deprecation for details.

*/

Answer 1

You are actually compiling fine. The output contains some warnings as you seems to use some deprecated APIs.

Answer 2

DataInputStream.readLine() is deprecated method. It will work fine for now but recommended to use some Reader stream( BufferedReader ) to read the date.

Answer 3

不推荐使用din.readLine() ，您可以使用javac -Xlint YouClass.java在下次查看错误。

Answer 4

This is only a warning you can still get your output

for details about deprecated Api refer to

Deprecated Api Details