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/FileandIOManagementGroup(["File and I/O Management"]) java(("Java")) -.-> java/ConcurrentandNetworkProgrammingGroup(["Concurrent and Network Programming"]) java(("Java")) -.-> java/SystemandDataProcessingGroup(["System and Data Processing"]) java(("Java")) -.-> java/BasicSyntaxGroup(["Basic Syntax"]) java(("Java")) -.-> java/ObjectOrientedandAdvancedConceptsGroup(["Object-Oriented and Advanced Concepts"]) 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.