How to apply system cls in java...

[cyzash]

I want to use clear screen in my program bcoz it's look very messy
but i don't know how.
I try googling but its difficult to undrstand the tutorials..
anybody?

public static void main(String[] args) {
        Scanner myOpt=new Scanner(System.in);
        Books b1= new Books();
        int optB=0;
        int updateOpt=0,x=0;
        do{
        
        System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^");
        System.out.println("WELCOME TO CyZAH && NADyA BOOKSTORES");
        System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
        
        System.out.println("-1- Initialize BOOK's details");
        System.out.println("-2- Key in BOOK's details");
        System.out.println("-3- Update BOOK's details");
        System.out.println("-4- Display BOOK's details");
        System.out.println("-5- Finish BOOK's tasks");
        
        System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
        
        System.out.println("==>Please choose your option:"); 
        optB=myOpt.nextInt();
        
        switch(optB){
            case 1: b1.intBooks();break;
            
            case 2: b1.enterBooks();
                    System.out.println("Input completed!");
                    System.out.println("###################");break;
                    
            case 3: b1.displayBookItem();
                    System.out.println("Please enter your option:");
                    updateOpt=myOpt.nextInt();
                    b1.updateBook(updateOpt);
                    System.out.println("Update completed"); break;
                    
            case 4: b1.displayBook();break;
            
            case 5: System.out.println("EXIT");break;
            
            default:System.out.println("Please try again ");
                   } 
         
        }while(optB!=5);
    }

[JosAH]

I want to use clear screen in my program bcoz it's look very messy
but i don't know how.
I try googling but its difficult to undrstand the tutorials..

The 'cls' command is built-in in your cmd.exe (shell or command processor), so it isn't available as a separate executable program. Lucky enough, you can pass it as a parameter to cmd.exe: "cmd /c cls" and cmd.exe is an executable program. You can 'exec' it; read the API documentation for the Runtime class for details.

kind regards,

Jos