How to pass date time to constructor?-CodePudding

I am trying to pass a date time string in form of yyyy-mm-dd but I am getting this error:

DateDemo.java:9: error: incompatible types: String cannot be converted to Date
       DateDemo test = new DateDemo("2021-12-11");

Also, should Boolean be capitalized or lowercased?

import java.util.Date;
public class DateDemo {
private Date start_date;
private Boolean status;

   public DateDemo(Date start_date) {
    this.start_date = start_date;
   }
   public static void main(String args[]) {
       DateDemo test = new DateDemo("2021-12-11");
       
   }
}

CodePudding user response：

You have a type mismatch issue. String <> Date. You should convert you input to the appropriate type for the constructor.

Since it's now 2021, we all should have moved beyond java.util.Date and embraced java.time instead

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class DateDemo {

    private LocalDate startDate;
    private Boolean status;

    public DateDemo(LocalDate startDate) {
        this.startDate = startDate;
    }

    public static void main(String args[]) {
        DateDemo test = new DateDemo(LocalDate.parse("2021-12-11", DateTimeFormatter.ISO_DATE));
    }
}

Have a look at the Date Time trail for more details

CodePudding user response：

Your constructor has a single argument of type Date

public DateDemo(Date start_date){...}

yet you are passing a String argument to it in your main method

DateDemo test = new DateDemo("2021-12-11");

Try this: DateDemo test = new DateDemo(DateFormat.parse("A VALID DATE STRING HERE"));