JAVA: eclipse. MyInput.readDouble cannot be resolved

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Hi. I'm having trouble with a simple bit of code.

Java

answer = MyInput.readDouble();

An error reports the following: 'MyInput cannot be resolved'

I really don't know what the problem is. I'm new to Java.

I included the following code:

Java

import java.io.*;

Your help is very much appreciated.

Posted 8-Feb-12 11:48am

EvScott

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walterhevedeich · Answer 1 · 2012-02-08T13:38:00

Solution 1

This generally means that the code cannot recognize the class. It might be that MyInput is from another library, in which case, you need to import that library as well.

Posted 8-Feb-12 13:38pm

walterhevedeich

Comments

TorstenH. 9-Feb-12 2:19am

MyInput is nothing at all - might be a custom class but is not part of any Java lib.

TorstenH. · Answer 2 · 2012-02-08T20:26:00

MyInput is a self made class, not part of any Java lib.

You should try one of the following:

Java

Scanner scan = new Scanner(System.in); 
String mySentence = scan.nextLine();

which would direct the System.in (which is the standard input -> keyboard) into a scanner which you can read from.

another version:

Java

BufferedReader oReader = new BufferedReader(new InputStreamReader(System.in));
String strRead = oReader.readLine();

...which uses a BufferedReader to hold the input for you. You can then read from it.

Both versions need some try/catch around it, eclipse will tell you and take care of that. That is needed as the operation can fail and your code would not be valid if the operation fails.