Introduction
The Java.io Console is the class used to access the input from the console. The methods which are available in console class are used to read the data like password, text. By using the console class for reading password then it is not visible to the user the console class will hide it.
Declaration
Java.io Console class is declared below:
Public final class console extends object implements Flushable Table
| Method | Description |
|---|---|
| void flush () | The function of this method is to flush the specified output stream. |
| String readLine() | The function of this method is to read the content of text from console. |
| char[] readPassword | The function of this method is to read the content related to password which is not displayed on console. |
| console printf(String format, Object args) | The function of this method is to write the content the string format to the output stream. |
Description
From the following classes, methods are inherited to console class.
- Java.io.Object
Examples
Usage of Printwriter writer() method.
[c]import java.io.Console;
import java.io.PrintWriter;
public class Console
{
public static void main(String[] args)
{
Console cnsl = null;
PrintWriter out = null;
try{
// creating a console object
cnsl = System.console();
// If console is not null then
if (cnsl != null) {
// creating a new print writer
out = cnsl.writer();
// print
out.println("SP LESSONS");
}
}catch(Exception ex)
{
// if any error occurs
ex.printStackTrace();
}
}
}[/c]
Output
The result will be as follows.
[c]SP LESSONS[/c]
Usage of char[] readPassword ()method.
[c]import java.io.Console;
public class Console
{
//class Splesson{
public static void main(String args[])
{
Console c=System.console();
System.out.println("Enter password: ");
char[] ch=c.readPassword();
String pass=String.valueOf(ch);//converting char array to string
System.out.println("Password is: "+pass);
}
}[/c]
Output
When enter the password result will be as follows.
[c]Enter password:
Password is:splessons[/c]
Key Points
- The Java.io Console is the class used to access the input from the console.
- The methods which are available in console class are used to read the data like password, text.
- By using the Java.io Console class for reading password then it is not visible to the user the console class will hide it.