non-static method getdata Error..!

I've coded this program but i am getting this error,
EmployeeeMain.java:57: non-static method getdata() cannot be referenced from a s
tatic context
Manager.getdata();
^
1 error

I've used the same technique in other program , it is working fine but this program is not working !!
Why I am getting this error ??
should i set the method getdata() static ??

class Employee{
    private int code;
    private String name;
    
    protected String input(){
    int l=0;
    byte[] b=new byte[255];
    String S;
    try{
    l=System.in.read(b,0,255);
    }
    catch (Exception r){}
    S=new String (b,0,l-2);
    return S;
    }
    
    protected void get(){
    System.out.println ("Enter Employee name: ");
    name=input();
    System.out.println ("Enter Employee code: ");
    code=Integer.parseInt(input());
    }
    
    protected void show(){
    System.out.println("Employee Name: " + name);
    System.out.println("Code: " + code);
    }
}

class Manager extends Employee{  // Manager Profile
    private int salary;
    private String education,experience;
    
    protected void getdata(){
    super.get();
    System.out.println ("Enter Salary: ");
    salary=Integer.parseInt(super.input());
    System.out.println ("Enter Experience: ");
    experience=super.input();
    System.out.println ("Enter Education: ");
    education=super.input();
    }
    
    protected void showdata(){
    super.show();
    System.out.println("Salary: " + salary + " PKR");
    System.out.println("Education: " + education);
    System.out.println("Experience: " + experience );
    }
}


class EmployeeeMain{
public static void main(String args[]){
    Manager first = new Manager();
    System.out.println ("Manager's Data");
    Manager.getdata();
    }
}