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Java – how can I use my program to solve these problems? (many problems were explained internally)

This question is not suitable for timid people and takes time I'm learning Java. I want to know if someone can tell me……

Java

2020-09-06

Java – returns Boolean or try catch

When a function or method contains error / invalid data, return false or throw an exception? public boolean login(Stri……

Java

2020-09-06

Java – custom predicate link

I'm learning java 8 I'm trying to create a custom predict link method, as shown below @FunctionalInterface public inte……

Java

2020-09-06

Is the tag a Java statement?

Whether the tag is a Java statement and whether the tag is a statement defined as a statement in the Java language spe……

Java

2020-09-06

Java – JSF inputtext and sessions in JSF managed beans

I want to know how to read the value of the input text from the managed bean @H_ 502_ 9@ @H_ 502_ 9@ <h:inputText i……

Java

2020-09-06

Migration issues from JUnit 4 to JUnit 5

I'm migrating my code base from junit4 to junit5 I used mockito in my testcase Below is the different version I use fo……

Java

2020-09-06

Java – spring MVC – JSP cannot be rendered

I just started trying to create a new project using spring MVC, and I encountered a problem. There is no manual or tut……

Java

2020-09-06

Java – decimalformat() and problems with Russian computers

I have a BigDecimal, and I convert it to string to make some modifications DecimalFormat decimalFormat = new DecimalFo……

Java

2020-09-06

java-ee – ColdFusion web. xml？

For deployment descriptors in J2EE Web containers / Web XML file, does ColdFusion simulation exist? I know that CF run……

Java

2020-09-06

Java – insert rows programmatically (parent and child)

I am using spring and JDBC template This scenario is customer table and orders table - parent - child relationship I w……

Java

2020-09-06

Java – string as reference type

See English answer > java string variable setting – reference or value? 9 String s1 = "x"; String s2 = s1; s1 = "xy……

Java

2020-09-06

Java – how to select overloaded methods by parameter types?

I tried to overload my method based on the parameter type: Fielderror extends to objecterror private String getMessage……

Java

2020-09-06

How to use resourcebundle to avoid hard coding configuration paths in Java applications?

I want to eliminate the dependency of hard coded path of configuration data in my java application. I know that using ……

Java

2020-09-06

Java – call executorservice. Java from completable future shutdownNow

When one of the already running tasks throws an exception, I need to cancel all the scheduled but not yet running comp……

Java

2020-09-06

Java – how to get enumeration values from attributes

I have an enumeration with values valid and invalid, which has Boolean attributes associated with it I want to get the……

Java

2020-09-06

Is it feasible for Java to check locking by forcing synchronization twice?

I've read everything about double check locking fixes that will never work. I don't like delayed initialization, but i……

Java

2020-09-06

Java – MIDP limited sockets?

In my opinion, there are some restrictions on socket creation in MIDP In order to isolate any possibility that it is a……

Java

2020-09-06

Java connection pool without JNDI?

I have a connection pool to access MySQL database from servlet I use JNDI to get the data source. JNDI is in my meta-i……

Java

2020-09-06

Java – keyloak missing form parameter: Grant_ type

I ran the keycloak standalone program on my local computer I created a new realm called "spring test" and then a new c……

Java

2020-09-06

Java – why does Maven assembly plugin place the same dependencies in my zip multiple times?

I put the assembly descriptors together <assembly> <id>all</id> <formats> <format>zi……

Java

2020-09-06

Convert this null check to Java 8 optional

I can't understand how to delete the following null check using java 8 option for (A objA : listOfObjectsA) { if (……

Java

2020-09-06

Java – what is the best mode or method to load a static cache?

Suppose I have the following (assuming only Java 1.4, so there is no generics): public class CacheManager { static……

Java

2020-09-06

Java – implement the project version page in JSF

I am creating a JSF application I have some projects from the database (such as products). I want to create a JSF page……

Java

2020-09-06

Java – unit test edge cases using JUnit

I have a utility class called stringprocessor In the breaklongwords () method, zero width spaces will be added to the ……

Java

2020-09-06

Java – object reference types in Ruby

I am a novice in ruby and am currently trying to use some examples in the ruby book as a guide: class Account attr_acc……

Java

2020-09-06

Java – is there a way to free the saturated connection pool?

I use open ESB on the GlassFish server We receive this error every few days: an error occurred while assigning a conne……

Java

2020-09-06

Java – find the algorithm with the least number of transactions between people

I've been thinking about it Suppose you have a list of books that people are selling I have a book. I want to buy a bo……

Java

2020-09-06

Java – jwindow never gets focus events

I have a jwindow (set to always be at the top) that you can click to get a pop-up menu If the user right clicks a wind……

Java

2020-09-06

Java – why does the JUnit test method need to be void?

I have read many places that the test method should / must be invalid, but no one says why I found no comments / JavaD……

Java

2020-09-06

The method filter (predict ) in Java – stream type is not applicable to parameters ((E) – > {})

How to set the value in Java 8 in the filter? I want to set emailid to null, where firstname is Raj How can I do this ……

Java

2020-09-06

Java – hibernate – entity manager factory

I recently encountered a problem that my web application can't start normally, and the stack trace can't tell exactly ……

Java

2020-09-06

Java – authentication fails and a message is displayed using Google’s firebase UI (Code: 10 message: 10)

I made a chat application using firebase real-time database I want to note here: I added SHA1 fingerprint How can I so……

Java

2020-09-06

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Java – how can I use my program to solve these problems? (many problems were explained internally)

Java – returns Boolean or try catch

Java – custom predicate link

Is the tag a Java statement?

Java – JSF inputtext and sessions in JSF managed beans

Migration issues from JUnit 4 to JUnit 5

Java – spring MVC – JSP cannot be rendered

Java – decimalformat() and problems with Russian computers

java-ee – ColdFusion web. xml？

Java – insert rows programmatically (parent and child)

Java – string as reference type

Java – how to select overloaded methods by parameter types?

How to use resourcebundle to avoid hard coding configuration paths in Java applications?

Java – call executorservice. Java from completable future shutdownNow

Java – how to get enumeration values from attributes

Is it feasible for Java to check locking by forcing synchronization twice?

Java – MIDP limited sockets?

Java connection pool without JNDI?

Java – keyloak missing form parameter: Grant_ type

Java – why does Maven assembly plugin place the same dependencies in my zip multiple times?

Convert this null check to Java 8 optional

Java – what is the best mode or method to load a static cache?

Java – implement the project version page in JSF

Java – unit test edge cases using JUnit

Java – object reference types in Ruby

Java – is there a way to free the saturated connection pool?

Java – find the algorithm with the least number of transactions between people

Java – jwindow never gets focus events

Java – why does the JUnit test method need to be void?

The method filter (predict ) in Java – stream type is not applicable to parameters ((E) – > {})

Java – hibernate – entity manager factory

Java – authentication fails and a message is displayed using Google’s firebase UI (Code: 10 message: 10)

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