Read input from console : Console « Development Class « Java

1. Java
2. Development Class
3. Console

Read input from console

  
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;
import java.text.ParseException;

public class ReadDoubleFromConsole {
  public static void main(String[] args) {
    System.out.println("Enter a number.");
    double numberFromConsole; 
    try {
      InputStreamReader isr = new InputStreamReader(System.in);
      BufferedReader br = new BufferedReader(isr);
      String s = br.readLine();
      DecimalFormat df = new DecimalFormat();
      Number n = df.parse(s);
      numberFromConsole = n.doubleValue();
    } catch (IOException e) {
      numberFromConsole = 0;
    } catch (ParseException e) {
      numberFromConsole = 0;
    }
    System.out.println(numberFromConsole );
  }
}


           
         
    
  

Related examples in the same category

1.	Turn System.out into a PrintWriter
2.	Output to standard output and standard error; and input from standard input.
3.	VarArgsDemo - show 1.5 variable arguments
4.	How to read from standard input
5.	How to deal with the console parameters
6.	Command line input
7.	Read an int from Standard Input
8.	Read an int from Standard Input, using 1.5
9.	SimpleCalc -- simple calculator using 1.5 java.util.Scanner
10.	Show use of Argv to get an integer value from command line
11.	Java program to calculate the area of a circle
12.	Java program to demonstrate menu selection
13.	Utility class for printing aligned columns of text
14.	Processing the command line
15.	A representation of the command line arguments passed to a Java class' main(String[]) method
16.	Helper class for storing long command lines inside temporary file.
17.	CommandLine Parser
18.	This parses command line arguments optimized for ease of programmer use.
19.	Console read and write Utils