java 現在が月で何回目の曜日なのかを取得する

Calendar calendar = Calendar.getInstance();

calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH)
// 回数が戻ってきます

import java.util.Calendar;
import java.text.SimpleDateFormat;

public class App {
    public static void main(String[] args) throws Exception {

        
        Calendar cal = Calendar.getInstance();        
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");        
        System.out.println(sdf.format(cal.getTime())); // 2022/05/14

        String[] str = { "日", "月", "火", "水", "木", "金", "土" };
        System.out.println(str[cal.get(Calendar.DAY_OF_WEEK) - 1]); // 土
        
        System.out.println(cal.get(Calendar.DAY_OF_WEEK_IN_MONTH)); // 2

    }
}