CODEWITHSUNDEEP
javatype-conversion
Enrico Morelli
Enrico Morelli

Reputation: 173

Entity Date property: Cannot format given Object as a Date

I've an entity Date property:

@Temporal(TemporalType.TIMESTAMP)
private Date paymentDate;

that I've to convert to a String. Using the following code I receive the Cannot format given Object as a Date exception:

Format df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
String pDate = df.format(item.getPaymentDate());

Where I wrong?

Upvotes: 0

Views: 1146

Answers (1)

Sotirios Delimanolis
Sotirios Delimanolis

Reputation: 280030

The Format#format(Object) method delegates to a sub type's format(Object, StringBuffer, FieldPosition) method. The DateFormat implementation which SimpleDateFormat inherits is as follows

public final StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition fieldPosition)
{
    if (obj instanceof Date)
        return format( (Date)obj, toAppendTo, fieldPosition );
    else if (obj instanceof Number)
        return format( new Date(((Number)obj).longValue()), toAppendTo, fieldPosition );
    else
        throw new IllegalArgumentException("Cannot format given Object as a Date");
}

In other words, the value returned by item.getPaymentDate() must either be null or be of a type other than java.util.Date or java.lang.Number.

Upvotes: 1

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