import java.awt.*;
// Need this import for reading data:
import java.io.*;

// reading data in a Java application
public class ReadingData1 {

    public static void main (String [] args) throws IOException {
	// Create a buffered reader
	BufferedReader in = new BufferedReader(
			new InputStreamReader(System.in));
	// string for storing a line of input
	String line;

	// Read one integer
	// prompt the user:
        System.out.print("Please enter a number: ");
	// read a line of input:
	line = in.readLine();
	// check what the input is:
	System.out.println("The input is: " + line);
	// extract the integer from the entered data:
	double n = Double.parseDouble(line);
	// print out the value of n:
	System.out.println("n = " + n);

	// increment n by 1.5
	n = n + 1.5;
	// print out the result:
	System.out.println("n = " + n);
    }

}

This is an example from CSci 1211 course.

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