Open In App

Console format(String, Object) method in Java with Examples

Improve
Improve
Like Article
Like
Save
Share
Report

The format(String, Object) method of Console class in Java is used to write a formatted string to the output stream of the console. It uses the specified format string and arguments.

Syntax:

public Console format(String fmt,
                      Object... args)

Parameters: This method accepts two parameters:

  • fmt – It represents the format of the string.
  • args – It represents the arguments that are referenced by the format specifiers in the string format.

Return value: This method returns the console.

Exceptions: This method throws IllegalFormatException if string format contains an illegal syntax or a format specifier is not compatible with the given arguments or insufficient arguments given the format string or other conditions that are illegal.

Note: System.console() returns null in an online IDE.

Below programs illustrate format(String, Object) method in Console class in IO package:

Program 1:




// Java program to illustrate
// Console format(String, Object) method
  
import java.io.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // Create the console object
        Console cnsl
            = System.console();
  
        if (cnsl == null) {
            System.out.println(
                "No console available");
            return;
        }
  
        String fmt = "%1$4s %2$10s %3$10s%n";
  
        cnsl.format(fmt, "Books", "Author", "Price");
        cnsl.format(fmt, "-----", "------", "-----");
        cnsl.format(fmt, "DBMS", "Navathe", "800");
        cnsl.format(fmt, "Algorithm", "Cormen", "925");
        cnsl.format(fmt, "Operating System", "Rajib Mall", "750");
    }
}


Output:

Program 2:




// Java program to illustrate
// Console format(String, Object) method
  
import java.io.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // Create the console object
        Console cnsl
            = System.console();
  
        if (cnsl == null) {
            System.out.println(
                "No console available");
            return;
        }
  
        String fmt = "%1$4s %2$10s %3$10s%n";
  
        cnsl.format(fmt, "Items", "Quantity", "Price");
        cnsl.format(fmt, "-----", "------", "-----");
        cnsl.format(fmt, "Tomato", "1 Kg", "80");
        cnsl.format(fmt, "Apple", "3 Kg", "500");
        cnsl.format(fmt, "Potato", "2 Kg", "75");
    }
}


Output:

References:
https://docs.oracle.com/javase/10/docs/api/java/io/Console.html#format(java.lang.String, java.lang.Object…)



Last Updated : 12 Jun, 2020
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads