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Showing content from https://www.tutorialspoint.com/java/lang/system_console.htm below:

Java System console() Method

The Java System console() method returns the unique Console object associated with the current Java virtual machine, if any.

Following is the declaration for java.lang.System.console() method

public static Console console()

NA

This method returns the system console, if any, otherwise null.

NA

The following example shows the usage of Java System console() method. In this example, using System.console() method, we retrieved a Console object which is then used to print a statement on console using printf() method. Lastly to reflect the changes, we've called the flush() method of the console to print the result on console.

package com.tutorialspoint;

import java.io.Console;

public class SystemDemo {

   public static void main(String[] args) {

      Console ob = System.console();

      ob.printf("Welcome to tutorialspoint...");

      // flushes the console
      ob.flush();
   }
} 

Let us compile and run the above program, this will produce the following result −

Welcome to tutorialspoint...

The following example shows the usage of Java System console() method. In this example, using System.console() method, we retrieved a Console object which is then used to print a int value on console using printf() method. Lastly to reflect the changes, we've called the flush() method of the console to print the result on console.

package com.tutorialspoint;

import java.io.Console;

public class SystemDemo {

   public static void main(String[] args) {

      Console ob = System.console();

      ob.printf("%d", 123);

      // flushes the console
      ob.flush();
   }
} 

Let us compile and run the above program, this will produce the following result −

123

The following example shows the usage of Java System console() method. In this example, using System.console() method, we retrieved a Console object which is then used to print a int value on console using printf() method. Lastly to reflect the changes, we've called the flush() method of the console to print the result on console.

package com.tutorialspoint;

import java.io.Console;

public class SystemDemo {

   public static void main(String[] args) {

      Console ob = System.console();

      ob.printf("%f", 123.23);

      // flushes the console
      ob.flush();
   }
} 

Let us compile and run the above program, this will produce the following result −

123.230000

java_lang_system.htm

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