Java: Clear the console

To clear the console in Java language, we have multiple methods depending on the environments (like: IDE, terminal, operating system, etc.) In this blog, we will learn how we can clear the console in Java language.

Table of Contents:

• Different Methods to Clear the Java Console
  • Method 1: Using ANSI Escape Code
  • Method 2: Using the platform-specific command
  • Method 3: Using the Command Line Interpreter
  • Method 4: Printing Multiple New Lines
• Which Method is Best?
• Conclusion
• FAQs

Different Methods to Clear the Java Console

While working with Java, it might be possible that our console is full of irrelevant messages, so sometimes we need to clear our console. Here, we will learn different methods with examples to clear our console.

Method 1: Using ANSI Escape Code

We can use ANSI Escape codes to clear the console in Java. ANSI escape codes are special character sequences that are interpreted by the terminal to perform various text formatting and screen manipulation tasks.

Code:

System.out.print("\033[H\033[2J");
System.out.flush();

Explanation:

• \033[H: This command moves the cursor to the top-left corner of the screen.
• \033[2J:  This command clears the entire console screen.

Method 2: Using the platform-specific command

We can clear the console by using platform-specific commands as well. We can make a ProcessBuilder for our system, whether it is Windows or Linux/Mac, then clear the console with the help of some arguments given in the ProcessBuilder.

• Windows: The cls command clears the console in the Windows Operating system.
• Linux/macOS: The clear command clears the terminal in the Linux or macOS system.

Code:

public class ClearConsole {
  public static void main(String[] args) {
        System.out.println("Clearing console using ProcessBuilder");
        String os = System.getProperty("os.name");
        try {
            if (os.startsWith("Windows")) {
                // Command for Windows
                new ProcessBuilder("cmd", "/c", "cls").inheritIO().start().waitFor();
            } else {
                // Command for Linux/Mac
                new ProcessBuilder("clear").inheritIO().start().waitFor();
            }

        } catch (Exception e) {
            System.out.println("Error while clearing console: " + e.getMessage());

        }
    }
}

Method 3: Using the Command Line Interpreter

We can also clear our console by using a command line interpreter. We have to run some commands on our CLI to clear our console.

For Windows:

Runtime.getRuntime().exec("cmd /c cls");

For Linux/macOS:

Runtime.getRuntime().exec("clear");

Method 4: Printing Multiple New Lines 

When we are working with a Java IDE (Eclipse, IntelliJ, NetBeans), where cls and ANSI code are not working, then we should simply print multiple blank lines, and our console will clear.

Code:

public static void clear() {
        for (int i = 0; i < 50; i++) {
            System.out.println();
        }
    }

Explanation: The above code will print 50 blank lines, making it easier to clear the console.

Which Method is Best?

When working with Java, we must know which method is best to clear the console. But it depends on the environment we are using. Let’s see the below table:

Conclusion

Java is a very powerful, high-level, and object-oriented programming language that is generally used by millions of developers to build and create a wide range of applications. 

So far in this article, we have learned three different methods to clear the console in Java. If you want to excel in your career in Java, please refer to our advanced Java course.

FAQs