Error convert string to date : ClassCastException

Question

I`m trying to convert a string to date:

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
Date dataEvento = null;

SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
dataEvento = (Date)dateFormat.parse("28/08/2010"); //the app crash here

LogCat:

03-06 10:06:19.867: E/AndroidRuntime(426): FATAL EXCEPTION: main 
03-06 10:06:19.867: E/AndroidRuntime(426): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ladessa.jccb/com.ladessa.jccb.MainActivity}: java.lang.ClassCastException: java.util.Date 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.os.Handler.dispatchMessage(Handler.java:99) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.os.Looper.loop(Looper.java:123) 03-06 10:06:19.867: E/AndroidRuntime(426):   at android.app.ActivityThread.main(ActivityThread.java:4627) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at java.lang.reflect.Method.invokeNative(Native Method) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at java.lang.reflect.Method.invoke(Method.java:521) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at dalvik.system.NativeStart.main(Native Method) 03-06 10:06:19.867: E/AndroidRuntime(426): Caused by: java.lang.ClassCastException: java.util.Date 
03-06 10:06:19.867: E/AndroidRuntime(426):  at com.ladessa.jccb.MainActivity.createScheduledNotification(MainActivity.java:59) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at com.ladessa.jccb.MainActivity.onCreate(MainActivity.java:110) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
03-06 10:06:19.867: E/AndroidRuntime(426):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
03-06 10:06:19.867: E/AndroidRuntime(426):  ... 11 more

Why are you casting the result of parse to a Date when it's a date already? — Thom
– Thom, Commented Mar 6, 2014 at 13:05
The Thom, I remove the cast and import java.utils.date instead of java.sql.date and it works — Ladessa
– Ladessa, Commented Mar 6, 2014 at 13:09
@illDev: In future, please make sure that you include relevant context - in this case at least the stack trace - when you ask a question. — Jon Skeet
– Jon Skeet, Commented Mar 6, 2014 at 13:15

Hamid Shatu · Accepted Answer · 2014-03-06 13:13:35Z

5

In the below line...

(Date)formatter.parse(str)

You are trying cast java.util.Date type Date object to java.sql.Date type Date object...that's why its throwing this Exception

java.lang.ClassCastException: java.util.Date cannot be cast to java.sql.Date

And its causing due to import of the below package...

import java.sql.Date;

You should import the package as below...So, you should remove the above import and import this below one.

import java.util.Date;

edited Mar 6, 2014 at 13:13

answered Mar 6, 2014 at 13:04

Hamid Shatu

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6 Comments

Jon Skeet Over a year ago

How do you know that? There's nothing about java.sql.Date in the question, and no indication of the error...

Hamid Shatu Over a year ago

cause...I also faced the same problem.

Ben Pearson Over a year ago

It's possible that the cast to a Date is an indicator there's a type mismatch

Jon Skeet Over a year ago

Well you may have faced a problem with somewhat similar symptoms, but I think you're making an assumption that it's the same problem. Now that we have the exception, I suspect you're correct - but I think it would have been wise to be a bit more circumspect than: "you have imported the below package"...

Ladessa Over a year ago

I remove the cast and import java.utils.date instead of java.sql.date and it works

|

RMachnik · Accepted Answer · 2014-03-06 13:05:58Z

1

Change libraries :) java.sql.Date to java.util.Date ;) this might help.

answered Mar 6, 2014 at 13:05

RMachnik

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2 Comments

Jon Skeet Over a year ago

This looks remarkably similar to Hamid's answer, but I don't see any imports in the question at all... where did you get the information that the OP is using java.sql.Date?

RMachnik Over a year ago

Maybye, but at the begening I had the same problems. So it is common mistake. But post might be released in the same time, I didn't see above answer first.

Bhanu Sharma · Accepted Answer · 2014-03-06 13:07:49Z

1

Its importing wrong library prob dude just use this

import java.util.Date;

answered Mar 6, 2014 at 13:07

Bhanu Sharma

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Comments

Jaykumar Patel · Accepted Answer · 2014-03-06 13:10:11Z

1

Try this code

String Stringdate = "28/08/2010";
SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
Date convertedDate = new Date();
try {
    convertedDate = dateFormat.parse(Stringdate);
} catch (ParseException e) {
    // TODO Auto-generated catch block
    System.err.println("Date Conversion Error : " + e.getMessage());
}
System.out.println(convertedDate);

answered Mar 6, 2014 at 13:10

Jaykumar Patel

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