Program for Console

[Sonali Sehgal]

I am preparing for SCJP 6.
Can you please explain java.io.Console class with the help of small program?

[Devaka Cooray]

There are only few methods in java.io.Console class
I would recommend you to read the javadoc (please have a look at the above link). And then you should solve some mock exam questions too.

[Sonali Sehgal]

I tried doing a program and there is a error coming in can you please help??

import java.io.Console;
public class NewConsole {
 
    public static void main(String[] args) {
    Console c=System.Console();
    char[] pw;
    pw=c.readPassword("%s","pw:");
    for(char ch:pw)
        c.format("%c",ch);
    c.format("/n");
    MyUtility mu=new MyUtility();
    while(true){
        name=c.readLine("%s","imput?:");
        c.format("output: %s \n",mu.doStuff(name));
     }
   }
}

class MyUtility{
    String doStuff(String arg1) {
        return "result is " +arg1;
        
    }
}

[Devaka Cooray]

Sonali Sehgal wrote:I tried doing a program and there is a error coming

What is the error you are getting there?
I can see a little error that the "name" variable is not defined.

[Sonali Sehgal]

Thanks a lot Devaka I got the solution and another thing I was using the version of Java that is 1.5 to fix the problem it should be of version1.6

[Wouter Oet]

Note that netbeans does not support the console class internally.

[Ankit Garg]

When you call System.console(), it will only return an instance of Console class if one is available. If the program is running in an environment which doesn't have a console, then null is returned...

[Sonali Sehgal]

Hi Wouter and Ankit,


So in order to execute the program will the upgrading the version of java from 1.5 to 1.6 will help or only console needs to be added to netbeans ....As Kathy says java.io.Console is the latest in version 1.6....I also tried this program on another computer with version 1.6 java it was successfully executing........

[Wouter Oet]

If you want to use java.io.Console you need to hava java 1.6. The problem is that if you develop in netbeans, the console class will not be available because netbeans does (not yet) support it.