Java 归档 - Page 502 of 655

Java – how to call super (…) and this (…) in the case of overloaded constructors?

I never needed to do this before, but since both must be the "first line" in the constructor, what should I do with it……

Java

2019-07-10

Java – where do I sort?

I have a database, I query, I don't know where to perform the sorting of results, so far, I have the following options……

Java

2019-07-10

Java: socket read timeout exception

I tried to call a very heavy process When I execute this process, I set a ridiculously large number of timeout times: ……

Java

2019-07-10

Java – how to use in Net?

Lucene is a good search engine, but Net version is the official JAVA version (the latest stable. Net version is 2.0, b……

Java

2019-07-10

Java – hide the program in the windows system tray

I want my program to display an icon in the taskbar status area near the clock in windows and find a way The thing is,……

Java

2019-07-10

Java’s better way to delete files (if any)

We need to be in file Delete () before calling file. Exists() before deleting the file File file = ...; if (file.exis……

Java

2019-07-10

Java generics and return types

I've just come across something I don't understand Why is every loop illegal when the second is the same? public inter……

Java

2019-07-10

Java – how to identify whether a string contains special characters that cannot be stored using utf8-mb4 character sets

Please refer to this tweet and the thread below. We are trying to store similar tweets to the database I can't store t……

Java

2019-07-10

Java – how to convert jsonobject to gson JsonObject？

I have an org json. Jsonobject object Create gson. From What is the simplest method of jsonobject object? thank you So……

Java

2019-07-10

Java – hibernate criteria: different entities and then restrictions

I have a standard to return all the data required by the application, basically: Criteria criteria = session.createCri……

Java

2019-07-10

Java – how to understand Maven dependency tree

Please forgive me if this is a dump problem, but I searched a lot and didn't understand how to actually read Maven dep……

Java

2019-07-10

Java – “with private access” errors and generics

I have a problem I can solve myself, but I still don't understand why my original code doesn't work, or if there is a ……

Java

2019-07-10

Java – comparison of positive and negative zeros

Why is java inconsistent when comparing - 0.0 and 0.0? What is the Java standard way to compare numbers to - 0 / 0? I ……

Java

2019-07-10

Java – does explicit locking automatically provide memory visibility?

Example code: class Sample{ private int v; public void setV(){ Lock a=new Lock(); a.lock(); ……

Java

2019-07-10

Using JavaFX application. On the shutdown hook Stop() method

So I use shutdown hooks for cleaning, because it does not always guarantee the execution of the shutdown hooks thread.……

Java

2019-07-10

Java – where to call public static void main?

I just want to know where our main methods are called Solution It is specified in the Java language specification, 12.……

Java

2019-07-10

Why does this exceed the 65535 byte limit in Java constructors and static initializers?

Disclaimer: I realize that I can generate this at Java runtime. When testing some code, I need a very special case I f……

Java

2019-07-09

Java – use GlassFish / Metro to simulate the problem of WCF secure web server

I'm trying to build a GlassFish hosted web service (for development and testing) and a WCF hosted web service I have t……

Java

2019-07-09

Java – how to implement batch processing using mybatis / spring?

I want to know how to use mybatis 3& amp; Spring 3? For example, this is what is being done now: spring. xml： <……

Java

2019-07-09

Java – if called in the synchronization method, thread. Will yield() lose the lock of the object?

I understand thread currentThread(). Yield () is a notification thread scheduler that can assign CPU loops to other th……

Java

2019-07-09

Java error when combining Lambdas and multiple catch clauses?

import java.io.*; import java.io.*; import java.net.*; public class Test { ……

Java

2019-07-09

Java – change string constants in compiled classes

I need to change the string constants in the deployed Java program, that is, compiled Class file It can be restarted, ……

Java

2019-07-09

Java – log4j2 why log4j?

I must miss something, but now I've been watching it for a few days, but why can you use log4j2 (not performance) befo……

Java

2019-07-09

What are the security implications of deserializing untrusted data in Java?

Can I safely deserialize untrusted data if my code has no assumptions about the state or class of the deserialized obj……

Java

2019-07-09

Java – an instance of an abstract class

See English answer > interview: can we instantiate abstract class? 15 public abstract class AbstractClassCreationTe……

Java

2019-07-09

Java – the best way to avoid duplicate code if two classes extend different classes

I'm developing an Android project and I'm facing this situation I have two classes: class A extends B { openDoor(){ /……

Java

2019-07-09

Java – spring boot swagger custom swagger UI html

I encountered a problem migrating the war application to the spring boot jar application I am using spring boot 1.4 1 ……

Java

2019-07-09

Java – where does velocity search for templates?

I need to use velocity from Java code in my web application (I use it as a mail template processor) So I have a standa……

Java

2019-07-09

Connect some in Java Txt file [closed]

I have some Txt file I want to connect them and generate a text file How will I execute in Java? file1.txt file2.txt C……

Java

2019-07-09

How to get datasource or connection from JPA2 entitymanager in Java EE 6

I have a working application that I use Java EE 6 with eclipse link persistence and a PostgreSQL database For user reg……

Java

2019-07-09

Close resultset in Java 7

See English answers > must JDBC resultsets and statements be closed separately although the connection is closed af……

Java

2019-07-09

How do I use java to capture selected screens from other applications?

We are trying to develop a screen capture utility How do we use java to capture the selected screen of another applica……

Java

2019-07-09

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Java – how to call super (…) and this (…) in the case of overloaded constructors?

Java – where do I sort?

Java: socket read timeout exception

Java – how to use in Net?

Java – hide the program in the windows system tray

Java’s better way to delete files (if any)

Java generics and return types

Java – how to identify whether a string contains special characters that cannot be stored using utf8-mb4 character sets

Java – how to convert jsonobject to gson JsonObject？

Java – hibernate criteria: different entities and then restrictions

Java – how to understand Maven dependency tree

Java – “with private access” errors and generics

Java – comparison of positive and negative zeros

Java – does explicit locking automatically provide memory visibility?

Using JavaFX application. On the shutdown hook Stop() method

Java – where to call public static void main?

Why does this exceed the 65535 byte limit in Java constructors and static initializers?

Java – use GlassFish / Metro to simulate the problem of WCF secure web server

Java – how to implement batch processing using mybatis / spring?

Java – if called in the synchronization method, thread. Will yield() lose the lock of the object?

Java error when combining Lambdas and multiple catch clauses?

Java – change string constants in compiled classes

Java – log4j2 why log4j?

What are the security implications of deserializing untrusted data in Java?

Java – an instance of an abstract class

Java – the best way to avoid duplicate code if two classes extend different classes

Java – spring boot swagger custom swagger UI html

Java – where does velocity search for templates?

Connect some in Java Txt file [closed]

How to get datasource or connection from JPA2 entitymanager in Java EE 6

Close resultset in Java 7

How do I use java to capture selected screens from other applications?

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