LxLxBlog

The easiest to understand example of volatile keyword in Java

I am reading the volatile keyword in Java and fully understand its theoretical part But what I'm looking for is a good……

Java

2020-09-15

When JavaMail is executed, all jframes are frozen

I develop the program of automobile management system Then, when the car comes in and drives, I want to send an email ……

Java

2020-09-15

Java – hibernate composite key

Is it necessary to map the composite ID to the class? Can you do this? <composite-id> <key-property=..../&g……

Java

2020-09-15

How to add rows and columns to JavaFX 8 tableview

I saw an example of adding rows to tableview on the Internet, such as using the person class in Oracle documentation B……

Java

2020-09-15

Java – what is the best practice for rounding floating point numbers to 2 decimal places?

See English answers > how to round a number to N decimal places in Java 29 I need to round the floating point value……

Java

2020-09-15

java – Google Guava vs. Apache Commons

I was looking for a bidirectional map implementation in Java and came across these two libraries: >Google guava (fo……

Java

2020-09-15

Java – this view is not constrained

I received the following error, I used Android studio 2.2 preview 3 I searched Google but couldn't find any resources ……

Java

2020-09-15

The java socket swingworker is running but has not received or transmitted a message

A few days ago, I tried to create a server - client or client server as an experiment to learn about sockets using thr……

Java

2020-09-15

Can (a = = 1 \ u0026 \ u0026 a = = 2 \ u0026 \ u0026 a = = 3) be evaluated as true in Java?

We know it can in JavaScript. But is it possible to print a "success" message under the conditions given below in Java……

Java

2020-09-15

Java – my Jasper template does not display text

I'm not sure why if I run my sample template, I can't see any text <?xml version="1.0"?> <jasperReport xm……

Java

2020-09-15

Java – execute TestNG. Java via cli Error in XML: unable to find or load main class org testng. TestNG

Before I entered it, I was a novice in selenium, and so on I looked up all the answers to the question and still could……

Java

2020-09-15

Java – double click: enlarge Android MapView?

After some work, my route application works normally Can you give me a hint? Solution Implement gesturelistener to rec……

Java

2020-09-15

Java – compile to a specific JRE using eclipse

I have two questions about compiling projects into specific jres in Eclipse: 1) Project Properties Window > java bu……

Java

2020-09-15

Return date type in Java format

See the English answer > change the format of date Java [closed] Example: original date: 2018 / 01 / 01t15:00.00 00……

Java

2020-09-15

JAVA_ What is the reason for the existence of the home environment variable?

Many Java based applications need to set up Java_ Home env variable What is the purpose of this variable? Solution An ……

Java

2020-09-15

What are JAVA memory management best practices?

I'm taking over some applications from former developers When I run the application through eclipse, I see a lot of in……

Java

2020-09-15

Java replacement regular expressions do not work properly

Why doesn't this line of code work? It should replace all punctuation with nothing m = m.replace("[\\?\\.;:'\"]","") A……

Java

2020-09-15

Using java_ Opts env variable running Java is invalid

In the shell script, I set up Java_ Opts environment variable (to enable remote debugging and increase memory), and th……

Java

2020-09-15

What is a native implementation in Java?

See English answer > what is the native keyword in Java for? 9 public native int hashCode() protected native Object……

Java

2020-09-15

Java splits strings into arrays

See English answers > java string split removed empty values 6 String values = "0|0|0|1|||0|1|0|||"; I need to put ……

Java

2020-09-15

Javafx-8 – launching a JavaFX application from another class

I need to start a JavaFX application from another "container" class and call the function on the application, but ther……

Java

2020-09-15

Java – what is a stack mapping framework

I've been paying attention to Java virtual machine specifications (JVMs) recently, trying to better understand how my ……

Java

2020-09-15

Java – the right way to update images using jlabels

I'm creating a GUI, and it's a fairly new swing and AWT I'm trying to create a GUI, set the background as an image at ……

Java

2020-09-15

Java array, NullPointerException?

I declare two cards: Card card1 = new Card('3',Card.Suit.clubs); Card card2 = new Card('T',Card.Suit.diamonds); This w……

Java

2020-09-15

Java – the specified DSN contains an architecture mismatch error

I received this error: An error occurred while trying to connect to the database using NetBeans and the Java programmi……

Java

2020-09-15

Java – how to expand the page size of PDF to add watermark?

My web application signs PDF documents I want users to download the original PDF document (unsigned), but add an image……

Java

2020-09-15

Unreachablebrowserexception is caused by the following: Java Lang.nullpointerexception when “webdriver. Firefox. Marionette” is used

I use selenium 3.4 0, Java 1.8 and Firefox 54.0 1 (64 bit) When I try to open a link with Firefox, I get a null pointe……

Java

2020-09-15

JApplet creates a ball that bounces and gradually drops in Java

public class Circle extends JApplet { public class Circle extends JApplet { public void paint(Graphics g) { ……

Java

2020-09-15

Java – can I sort two lists into each other?

I prototype in Python and I use the zip function. I don't know how to do this in Java Basically, I have two lists (one……

Java

2020-09-15

Java – populate JfreeChart timeseriescollection from MySQL DB?

I'm trying to create a chart in my application that will return the temperature in a few months This chart is a JfreeC……

Java

2020-09-15

Reverse single linked list Java

How to reverse a singly linked list in blocks of some given size in O (n) time in place? 4 public void reverseList(){ ……

Java

2020-09-15

Annotation method in Java

5. General notes Refer to Java core technology Volume I for the above contents

Java

2020-09-13

搜索内容

The easiest to understand example of volatile keyword in Java

When JavaMail is executed, all jframes are frozen

Java – hibernate composite key

How to add rows and columns to JavaFX 8 tableview

Java – what is the best practice for rounding floating point numbers to 2 decimal places?

java – Google Guava vs. Apache Commons

Java – this view is not constrained

The java socket swingworker is running but has not received or transmitted a message

Can (a = = 1 \ u0026 \ u0026 a = = 2 \ u0026 \ u0026 a = = 3) be evaluated as true in Java?

Java – my Jasper template does not display text

Java – execute TestNG. Java via cli Error in XML: unable to find or load main class org testng. TestNG

Java – double click: enlarge Android MapView?

Java – compile to a specific JRE using eclipse

Return date type in Java format

JAVA_ What is the reason for the existence of the home environment variable?

What are JAVA memory management best practices?

Java replacement regular expressions do not work properly

Using java_ Opts env variable running Java is invalid

What is a native implementation in Java?

Java splits strings into arrays

Javafx-8 – launching a JavaFX application from another class

Java – what is a stack mapping framework

Java – the right way to update images using jlabels

Java array, NullPointerException?

Java – the specified DSN contains an architecture mismatch error

Java – how to expand the page size of PDF to add watermark?

Unreachablebrowserexception is caused by the following: Java Lang.nullpointerexception when “webdriver. Firefox. Marionette” is used

JApplet creates a ball that bounces and gradually drops in Java

Java – can I sort two lists into each other?

Java – populate JfreeChart timeseriescollection from MySQL DB?

Reverse single linked list Java

Annotation method in Java

Categories

Recent Posts

Tags