Recent questions tagged JAVA

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java - Calculate month difference in Joda Time

At the 4th line of code (ignore whitespace & comments) and beyond I'm calculating the month difference between 2 dates. ... ; } } return 0; } 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 - Oracle Create Table if it does not exist

Can anyone point me to the right syntax to use in order to create a table only if it does not currently ... constraint or a SQLPlus constraint. 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 - ModelMapper: Ensure that method has zero parameters and does not return void

I have the following configuration for the model mapper to convert an instance of User class to an instance of ... and getters for attributes } 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 remove the carriage return from string while pasting content to Excel file

I have a problem while pasting my contents (or text) generated by Java code into excel. The problem is that ... with multiple lines in my cell? 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 - Generate APK for different architectures - FFmpegMediaMetadataRetriever

I'm busy adding FFmpegMediaMetadataRetriever pre-build .aar files to my project to reduce the Apk file size for ... armv7-fmmr.aar as normal? 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 - Fastest way to generate all binary strings of size n into a boolean array?

For example, if I wanted all binary strings of length 3 I could simply declare them like this: boolean[] str1 ... an ArrayList, if that matters. 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 - Hibernate @GeneratedValue null error for primary key

I am using Hibernate to save an object in the database. I am generating my primary key with @GeneratedValue annotation. ... :204) ... 59 more 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 - ObjectInputStream Invalid Stream Header: 00000000

I want to use a single ObjectInputStream to read from a byte array, but I keep getting a StreamCorruptedException ... am I doing wrong here? 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 - Custom RestTemplate using requestFactory of RestTemplateBuilder in SpringBoot 2.1.x is not backward compatible with version 1.5.x

In Spring Boot 1.5.x, I was creating a custom RestTemplate like below: @Bean public RestTemplate restTemplate( ... Boot 2.1.x? 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 - Shortcut key for jButton without using alt key

In SWT you can give any button a shortcut key simply by adding & in front of the letter in the button label. For ... ); // some function } }); See Question&Answers more detail:os...

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

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160 views

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java - How to determine which lines are visible in scrollable JTextArea?

How to determine number of the first visible line and the number of lines currently visible in scrollable JTextArea ... inside a JScrollPane)? 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 - Using Unicode characters for file names inside a zip archive

I am zipping a file name contains some special characters like Péréquation LES HOPITAUX NEUFS.xls to a different ... inside a zip archive? 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 POI : crash when using autoSizeColumn()

autoSizeColumn method of POI throws an exception that I didn't manage to resolve : "java.lang.ClassNotFoundException: ... ? 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 - @ManyToMany without join table (legacy database)

I have to apply JPA in a legacy database with an awful design. Unfortunately is not possible to change it. ... JPA and navigate through them? See Question&Answers more detail:os...

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

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290 views

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java - How to install Cucumber-JVM on Eclipse

I have searched all over the internet but a newbie on java I cant figure out how to simply install Cucumber- ... get Cucumber-JVM on Eclipse? See Question&Answers more detail:os...

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

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264 views

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java - How to align JLabel-JTextField pairs vertically

What I mean by a JLabel-JTextField pair is a JLabel component followed by a JTextField one, for example, " ... follow would be aligned? Thanks. 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 - setSize() doesn't work for JFrame

import javax.swing.JFrame; import javax.swing.SwingUtilities; class Demo { JFrame jf; Demo() { jf=new JFrame("Demo" ... I don't know about them. 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 - Calendar.before(Object when), why Object?

From the javadoc of Calendar.before(Object when): Returns whether this Calendar represents a time before the time ... for quite some time. See Question&Answers more detail:os...

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

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136 views

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java - Number of objects created during string concatenation

Can someone please tell me how many objects will be created on executing the System.out.println statement in the below code ... j value is "+j); 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 - Apache-POI: Unable to write to an existing workbook

I'm working on a project which needs to read an Excel Workbook, calls the necessary Web Services, and then takes ... ran in to similar issue? See Question&Answers more detail:os...

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

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663 views

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java - How to print Arabic characters in left-to-right direction

I have a sequence of English and Arabic text that should be printed in an aligned way. For example: List< ... reversing the list before output? See Question&Answers more detail:os...

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

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170 views

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java - URL is accessable with browser but still FileNotFoundException with URLConnection

I use a HttpURLConnection to connect to a website and receive an ResponseCode=404 (HTTP_NOT_FOUND). However I have ... : http://localhost:8080/ See Question&Answers more detail:os...

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

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94 views

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java - How to make a line curve through points

I'm looking for a way to make a line curve through a number of points. It would be preferable to use 3 ... help offered - 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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352 views

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java - How can I find all implementations of interface in classpath?

I'm implementing an interface and now I'd like to get all implementations of this interface in classpath. Is ... should I do something else? See Question&Answers more detail:os...

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

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273 views

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java - Gwt Request builder - how to return the response string

I need to implement a function that calls a web service and return the response. I tried public String ... when getFolderJson() function ? See Question&Answers more detail:os...

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

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408 views

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java - Closing BufferedReader and InputStreamReader

This piece of code is creating memory leak issues cause of BufferedReader and InputStreamReader which I think might be ... catch(Exception 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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345 views

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java - What is the best way to parse a date in MM/DD/YY format and adjust it to the current / previous century?

One of our customers wants to be able to enter a date with only 2 digits for the year component. The date ... + twoDigitYear; return newDate; } 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 can't javac infer generic type arguments for functions used as arguments?

In the following sample, why is the compiler able to infer the generic arguments for the first call to Foo. ... enough context for it here. See Question&Answers more detail:os...

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

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