Mastering Java's isISOControl Method

Introduction

A character is an ISO control character if its code lies in the range of '\u000' through '\u001F' or in the range of '\u007F' through '\u009F'.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL java(("`Java`")) -.-> java/BasicSyntaxGroup(["`Basic Syntax`"]) java(("`Java`")) -.-> java/ObjectOrientedandAdvancedConceptsGroup(["`Object-Oriented and Advanced Concepts`"]) java(("`Java`")) -.-> java/FileandIOManagementGroup(["`File and I/O Management`"]) java(("`Java`")) -.-> java/ConcurrentandNetworkProgrammingGroup(["`Concurrent and Network Programming`"]) java(("`Java`")) -.-> java/SystemandDataProcessingGroup(["`System and Data Processing`"]) java/BasicSyntaxGroup -.-> java/if_else("`If...Else`") java/BasicSyntaxGroup -.-> java/output("`Output`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/classes_objects("`Classes/Objects`") java/ObjectOrientedandAdvancedConceptsGroup -.-> java/user_input("`User Input`") java/FileandIOManagementGroup -.-> java/files("`Files`") java/FileandIOManagementGroup -.-> java/create_write_files("`Create/Write Files`") java/ConcurrentandNetworkProgrammingGroup -.-> java/working("`Working`") java/SystemandDataProcessingGroup -.-> java/string_methods("`String Methods`") subgraph Lab Skills java/if_else -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/output -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/classes_objects -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/user_input -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/files -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/create_write_files -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/working -.-> lab-117523{{"`Java Character isISOControl Method`"}} java/string_methods -.-> lab-117523{{"`Java Character isISOControl Method`"}} end

Create a Java file

Create a new Java file named ISOControlChar.java in the ~/project directory by running the following command in the terminal:

touch ~/project/ISOControlChar.java

Write the main method

Now we will write the main method in the ISOControlChar.java file. The main method will read a character from the user and check if it is an ISO control character or not using the isISOControl(char ch) method.

import java.util.Scanner;

public class ISOControlChar {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter any character: ");
        char ch = sc.next().charAt(0);

        if(Character.isISOControl(ch)){
            System.out.println(ch + " is an ISO control character.");
        } else {
            System.out.println(ch + " is not an ISO control character.");
        }
    }
}

Compile and run the program

Compile the ISOControlChar class by running the following command:

javac ISOControlChar.java

Now, to run the program, enter the following command:

java ISOControlChar

Summary

In this lab, we learned how to use the isISOControl(char ch) method of the Java Character class to check if a character is an ISO control character or not. We also learned to create a Java program to test if a given character is an ISO control character or not.

Java Character isISOControl Method