Java 归档 - Page 102 of 655

Java – inheritance aware class for mapping to replace the ‘instanceof’ series

I'm looking for some magical class map utilities that give a type and return the value associated with that type or it……

Java

2020-08-26

Java – what’s the difference between creating objects in these two ways?

I want to know the difference between these: 1-) JFrame frame = new JFrame(); JLabel label = new JLabel("example"); fr……

Java

2020-08-26

Java – the difference between defining variables inside and outside a loop

In terms of style or performance, is it better to define variables inside or outside the loop? For example: int var; f……

Java

2020-08-26

Java – moves characters in a string to the left

I'm a novice at stack overflow. I have a lab problem with a programming class that has been avoiding me The problem re……

Java

2020-08-26

Set the timestamp to the current time in Java

I'm trying to set the current date and time in the Java ee7 web application to my Apache Derby database I use time sta……

Java

2020-08-26

Java imageio grayscale PNG problem

I have a grayscale image (actually "Lena") and I want to try it out I regard it as 512 × 512 PNG files, 216 kinds of g……

Java

2020-08-26

CPU – what is a clock interrupt?

I can't find the correct definition of this on the Internet >Does every clock tick happen? > Does it happen ever……

Java

2020-08-26

Java – use the stringtokenizer to return the rest of the string

After watching it for more than an hour, I can't seem to find a way to achieve this If I do StringTokenizer sTokenizer……

Java

2020-08-26

Java hashtable non constant time operation

I am currently learning the hash table in Java. I have questions about the operation and performance speed of the hash……

Java

2020-08-26

Java – is webdriver a class or an interface?

Starting with selenium docs, webdriver is an interface, but in eclipse, org openqa. Selenium packages are displayed in……

Java

2020-08-26

What is a good use case for Java beans?

I just saw the Java beans specification I think using only getters, setters and empty constructors will make the code ……

Java

2020-08-26

Java – invalid from phone number with us number

I am a novice of twilio and try to send text messages using Java API As I saw in other sof posts, I posted my first lo……

Java

2020-08-26

Implicit type conversion of Java – lambda expressions

Consider the following courses: public void method() { test(() -> { }); } void test(Runnable a) { System.o……

Java

2020-08-26

Java – use the same fragment multiple times in the same activity / layout

Not a 100% term, so please be patient I have an activity to compare two items side by side, one on the left and the ot……

Java

2020-08-26

Java – am I right? I’ve been collecting compiler errors

I'm not sure if I write correctly I checked my notes to make sure I used all the appropriate symbols, but I've been re……

Java

2020-08-26

Java randomization – (minus sign) and (plus sign)

Is there any way to add a plus or minus sign randomly? I have a program in which an elf moves on the screen. When you ……

Java

2020-08-26

Java – JPA or hibernate generates (non primary key) column values instead of starting with 1

I want a JPA / Hibernate (preferably JPA) annotation that can generate the value of a column. It is not a primary key ……

Java

2020-08-26

How to refactor this HashSet in Java

I'm new to Java I have a HashSet method. I want to know a better method to encode the following code: public HashSet&l……

Java

2020-08-26

Java – HashMap places duplicate values unnecessarily

I have the following code. I want to insert the result into the database, but now I just want to print out the key wit……

Java

2020-08-26

Java – eclipse Mars toolbar entries have several blanks

I have updated the moon from the moon to Mars, and there is a big gap in the toolbar entries Right clicking a toolbar ……

Java

2020-08-26

Java: can wildcard array types be used as parameters and return types?

For example, consider a function that accepts the ArrayList of strings, splits it into string arrays, and returns the ……

Java

2020-08-26

Java – selenium webdriver: cannot find element in iframe using TinyMCE editor

Maybe my problem is similar to this selenium webdriver cannot locate element within an iframe, and throws NoSuchElemen……

Java

2020-08-26

Java – how to encode stream findNth()？

And stream Similar to findfirst(), is there any way to write stream findNth()？ I'm practicing Java 8. 0 by rewriting ……

Java

2020-08-26

Java – flyway 3.1 migration checksum mismatch The calculation of the checksum depends on the platform

I have exactly the same project source and SQL script on windows and Ubuntu clients and development platforms Cause: o……

Java

2020-08-26

Java – why does the @ requestmapping spring annotation in the controller capture more of what I want?

I have a simple spring controller and mapping: @Controller public class HomeController { @RequestMapping(value = "/hom……

Java

2020-08-26

Java – how to get the number of characters in jtextarea?

I have a jtextarea. I need to convert the character of each field to another character So I thought of a simple cycle:……

Java

2020-08-26

Java: check whether the IP address is in the array list

Is there a special method to check whether there are IP addresses in ArrayList? Now I have an ArrayList composed of IP……

Java

2020-08-26

Java – Stanford parser out of memory

I tried to run the Stanford parser in Ubuntu using Python code My text file is 500 MB and I tried to parse it I have a……

Java

2020-08-26

JavaFX freeze problem

I'm messing with the JavaFX API. For some reason, the application seems to freeze after a (seemingly) random time It i……

Java

2020-08-26

Java – flexible search with parameters returns a null value

I have to perform this flexible search query in the service Java class: select sum({oe:totalPrice}) from {Order as or……

Java

2020-08-26

Java – xpages: managedbeans often “lose” global domino session objects

I'm building a managedbean for the xpages application Currently, the bean is registered in the view - scoped faces - c……

Java

2020-08-26

Java – is there a way to loop variable names?

For example, I have the following variables: //String Var1 = something,Var2 = something etc.. for (int i = 1; i <= ……

Java

2020-08-26

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Java – inheritance aware class for mapping to replace the ‘instanceof’ series

Java – what’s the difference between creating objects in these two ways?

Java – the difference between defining variables inside and outside a loop

Java – moves characters in a string to the left

Set the timestamp to the current time in Java

Java imageio grayscale PNG problem

CPU – what is a clock interrupt?

Java – use the stringtokenizer to return the rest of the string

Java hashtable non constant time operation

Java – is webdriver a class or an interface?

What is a good use case for Java beans?

Java – invalid from phone number with us number

Implicit type conversion of Java – lambda expressions

Java – use the same fragment multiple times in the same activity / layout

Java – am I right? I’ve been collecting compiler errors

Java randomization – (minus sign) and (plus sign)

Java – JPA or hibernate generates (non primary key) column values instead of starting with 1

How to refactor this HashSet in Java

Java – HashMap places duplicate values unnecessarily

Java – eclipse Mars toolbar entries have several blanks

Java: can wildcard array types be used as parameters and return types?

Java – selenium webdriver: cannot find element in iframe using TinyMCE editor

Java – how to encode stream findNth()？

Java – flyway 3.1 migration checksum mismatch The calculation of the checksum depends on the platform

Java – why does the @ requestmapping spring annotation in the controller capture more of what I want?

Java – how to get the number of characters in jtextarea?

Java: check whether the IP address is in the array list

Java – Stanford parser out of memory

JavaFX freeze problem

Java – flexible search with parameters returns a null value

Java – xpages: managedbeans often “lose” global domino session objects

Java – is there a way to loop variable names?

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