CODEWITHSUNDEEP
javadateformatting
Tapas Bose
Tapas Bose

Reputation: 29806

Formatting Date to get Date of a Specific format

I am trying to format Date to get a Date of a specific format. However it is not working. Don't know why! Here is what I did:

           for(LeaveApply leaveApply : leaveApplyList) {
                SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
                try {
                    leaveApply.setDate(dateFormat.parse(dateFormat.format(leaveApply.getDate())));
                } catch (ParseException e) {
                    e.printStackTrace();
                }
            }

The output is :

LeaveApply [id=1, user=id [1]; loginName [admin], leaveType=Medical Leave, leaveTime=Half Leave, date=Fri Apr 15 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sat Apr 02 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sun Apr 03 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sat Apr 09 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sun Apr 10 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sat Apr 16 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sun Apr 17 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sat Apr 23 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sun Apr 24 00:00:00 IST 2011]
LeaveApply [id=0, user=id [1]; loginName [admin], leaveType=Weekend, leaveTime=Full Leave, date=Sat Apr 30 00:00:00 IST 2011]

As you can see the date is not in desired format (dd-MM-yyyy). Any help will be appreciable. The LeaveApply class is :

public class LeaveApply implements Serializable {

    private static final long serialVersionUID = -7223672229309295181L;
    private long id;
    private User user;
    private String leaveType;
    private String leaveTime;
    private Date date;

    public LeaveApply() {

    }

    public LeaveApply(User user, String leaveType, String leaveTime, Date date) {
        super();
        this.user = user;
        this.leaveType = leaveType;
        this.leaveTime = leaveTime;
        this.date = date;
    }    

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String getLeaveType() {
        return leaveType;
    }

    public void setLeaveType(String leaveType) {
        this.leaveType = leaveType;
    }

    public String getLeaveTime() {
        return leaveTime;
    }

    public void setLeaveTime(String leaveTime) {
        this.leaveTime = leaveTime;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    @Override
    public String toString() {
        return "LeaveApply [id=" + id + ", user=" + user + ", leaveType=" + leaveType + ", leaveTime=" + leaveTime + ", date=" + date + "]";
    }    
}

And I am printing the list as :

for (LeaveApply leaveApply : leaveApplyList) {
        System.out.println(leaveApply);
}

Upvotes: 0

Views: 4928

Answers (3)

rsp
rsp

Reputation: 23373

You need to use the SimpleDateFormat to format the string when you print it. What your code does now is:

  • get a timestamp
  • format it
  • parse the formatted string back to a timestamp
  • set the timestamp

Which is a rather expensive no-op, as a Date object only contains a long representing the timestamp, no formatting information.

Further on, where you print the timestamp, you use the default date format. You should use your date formatted at that point instead.

Upvotes: 2

Prince John Wesley
Prince John Wesley

Reputation: 63688

Call SimpleDateFormat.format(Date) in your LeaveApply.toString() implemention for the desired output.

Upvotes: 2

Jigar Joshi
Jigar Joshi

Reputation: 240860

As you format you will get the desired format in the String, as you parse it back you will get the Date object and it will execute toString() so you will always get the default format.

Upvotes: 1

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