Can `R.id.btn_login_submit` be omitted?

as follows：

Button btnSubmit = findViewById(R.id.btn_login_submit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_login_submit:
                Toast.makeText(LoginActivity.this, "click", Toast.LENGTH_SHORT).show();
                break;
        }
    }
});

Button btnSubmit = findViewById(R.id.btn_login_submit);
btnSubmit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Toast.makeText(LoginActivity.this, "click", Toast.LENGTH_SHORT).show();
    }
});

They both worked equally well. Can the switch be omitted? The btnSubmit has been findViewById. Is switch getId repeated?