Clearing console in Intellij-idea

Use Grep Console plugin for clearing it when it matches some output.

IntelliJ IDEA console is not a real terminal, so there is no command to clear it from your Java code.

See the issue here.

Try run your application in other terminal, then you can make a function like this:

public static void ClearConsole(){
    try{
        String operatingSystem = System.getProperty("os.name") //Check the current operating system
          
        if(operatingSystem.contains("Windows")){        
            ProcessBuilder pb = new ProcessBuilder("cmd", "/c", "cls");
            Process startProcess = pb.inheritIO.start();
            startProcess.waitFor();
        } else {
            ProcessBuilder pb = new ProcessBuilder("clear");
            Process startProcess = pb.inheritIO.start();

            startProcess.waitFor();
        } 
    }catch(Exception e){
        System.out.println(e);
    }
}

"Right" click over the console and select "clear all"