Recent questions tagged java

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java - Problem upgrading my Fragment's Navigation version(from 2.3.5 to 2.4.0-alpha03)

I have been trying to upgrade my fragment's navigation version from 2.3.5 to 2.4.0-alpha03 so that it ... ="@id/imageView4" android:padding="8dp" android:textColor="@color/colorAcc...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Random permutation of integers using a random number generator

This is my homework assignment: Random r = new Random(); public int get100RandomNumber() { return 1 + r.nextInt(100 ... } } Thanks for any help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - ParseException when parsing 3 character abbreviated month using SimpleDateFormat

Here is my code, SimpleDateFormat format = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); Date dft = (Date) ... to be used to parse milliseconds? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android Firestore querying particular value in Array of Objects

This is my structure of the firestore database: Expected result: to get all the jobs, where in the experience ... for array of custom object. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - need to access the system permission

I am trying to access the folder of my app from data/data but it need to change the permission to 0777. So, I had ... Log.d(TAG,e.toString()); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to group 2 udp clients?

What i'm trying to do is group 2 clients and make them communicate with eachother. So if 2 clients are connected they ... .println(e); } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Class "<CLASS_NAME>" nether has a main method nor its servlet specified in file web.xml

I am using NetBeans 7.1 and made a servlet in it. Now when I am running it, it is giving me Class ' ' ... ordinary servlet with no logic in it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How does method chaining work?

How does getRequestDispatcher("xxx") get called from getServletContext() in the example below? How does calling ... include(request, response); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why is my line not drawing?

So I have defined a mouseEventlistener and mousemotionListener to define points as so. protected Point elementPosition = ... Java by the way. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - list.contains does not work

I am trying to develop a TS3 Bot in Java with this API: https://github.com/TheHolyWaffle/TeamSpeak-3-Java- ... 100, namemode=0, n_modifyp=100} See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - DateTimeParseException: Text '2019-06-07 12:18:16' could not be parsed

I have following code to convert an Instant to String then convert it back to I String timestampString = ... convert the timestamp to? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Loop Keyword Program Homework

It will ask the user for a keyword to search for. Then, it will ask the user to enter sentences over and over ... contain the keyword"); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Find if child inside child data is exist or not Android Firebase

This may be duplicate Question but i have tries alot but i didnt get my result, Here is my firebase structure ... databaseError) { } }); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Getting ZoneId from a SimpleTimeZone

Using Java I have a SimpleTimeZone instance with GMT offset and daylight saving time information from a legacy system. ... ); stz.toZoneId(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to show pictures in jFrame, using java2d?

I'm new on working with Java and Netbeans. In many others languages, it's a simple stuff to do. But after broke ... to do? Thanks in advance... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - byte[] toString() gives a weird string instead of actual value

byte[] a has value of {119}, which is the ascii equivalent of "w", but when I use .toString() to convert it ... ; while ( rscvString != "w" ){ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Printing selected Component of JFrame to Printer

I have this Application Developed in Java. I want to print only some Components, for example "Customer Name", " ... not able to print properly. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - error: incompatible types: unexpected return value Char compare to String

I am trying to compare char to a String but getting an error. Error error: incompatible types: unexpected return value code: ... ]{c})); } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - start date and end date between two dates

hi i need to get all the start dates and end date of each and every month in between given two years pulbic ... " to be in Date object. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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232 views

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java - Error Message: Int cann't be converted to type

I am very very new to my intro to java course and I was looking for help with an error that I was receiving ... is the Console I can check? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Arraylist.clear clearing all array lists?

I have 2 separate array lists. one called spawnList and another called foundList I have the code run through, ... foundList is being cleared? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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219 views

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java - Parse String to date with timezone offset intact

We have a client sending date to us in String format as "2017-06-14T04:00:00-08:00". We need to ... Date in JAVA without changing the offset? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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181 views

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java - does these code has memory leakage?

static private ArrayList seriesColors = new ArrayList(); public Audiogram(int widthParm, int heightParm) throws ... has serious flaws? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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284 views

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java - Role of seed in random number generation

I have a big question in my mind: I can use a seed number to generate random numbers: Random rand = new Random ... : Random rand = new Random(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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168 views

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java - SnakeGame how to make the tail follow the head?

I am making a snake game, and I am stuck at where making the tails follow the head. And I heard using an ... need to change my code? Thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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235 views

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java - Select item from JCombobox and delete the row in database

I am working on a project in which I have a SQLite database with a table called Table1 and values title/location without ... , null, ex); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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143 views

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java - Best way to sort 2 array lists?

I have 2 array lists. One is an array list containing birthdays. The other is an array list of names. I am ... in Java? Thank you very much! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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169 views

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java - BeanCreationException after adding two variables

Can someone show me how to get past a BeanCreationException? I am getting a BeanCreationException after adding two ... .toString(); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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