Java 归档 - Page 303 of 655

JSF – integer gets the default value 0, which needs to be null in Java

See English answer > H: inputtext which is bound to integer property is submitting value 0 instead of null1 All I n……

Java

2020-02-22

Unit testing – unit testing is worth the effort, in a large and old (5yr) code base?

I just joined a team that has been working in the main mode for the past five years (Java, Maven based projects) There……

Java

2020-02-22

When adding another object, Java util. ConcurrentModificationException

I am experiencing this exception What's wrong with my code? public class GlennTestMain { static ArrayList<Pers……

Java

2020-02-22

Java – why do you return false and true?

public class Test { public class Test { public static final Double DEFAULT_DOUBLE = 12.0; public static final ……

Java

2020-02-22

Java – can spring MVC with JPA be used to update a subset of attributes on an entity?

I am using spring Roo, spring MVC and JPA to save MySQL database I'm new to spring MVC and Java, but I work with cake,……

Java

2020-02-22

How to use Java math Commons curvefitter?

How do I fit a function to a set of data using math Commons curvefitter? I was told to use curvefitter with Levenberg ……

Java

2020-02-22

Java – stream lists are grouped

I'm looking for refactoring how to use streams in some of my code The first example is my current practice The second ……

Java

2020-02-22

Java – performance of log4j

I am developing a web application. I want to record some information to help me improve and observe the application (I……

Java

2020-02-22

java – IllegalArgumentException readExceptionFromParcel

I got this error from one of my users. I don't know how to solve it java. Lang.illegalargumentexception exception data……

Java

2020-02-22

Multithreading – what is saved in context switching?

Precisely saves and restores content in context switching between two threads >In the same process > between two……

Java

2020-02-22

Comment – @ singleton in Java EJB

I have an EJB that needs to be single and stateful because it will become a connection pool My question is: >If I d……

Java

2020-02-22

Java – the easiest way to index a collection’s attributes, which are themselves a collection

I have a list < foo > and want a guava Multimap < string, foo > we divide each tag of their collection <……

Java

2020-02-22

Java me – how to create a browser window in J2ME?

How to create a browser component in J2ME that can display web pages in applications? Is there an API available? Or is……

Java

2020-02-22

How to separate lists by using conditions of Java 8 streams

Consider the following codes: List<Integer> odd = new ArrayList<Integer>(); List<Integer> even = nu……

Java

2020-02-22

Java – insert the row and get the generated ID

I am trying to use spring's jdbctemplate class to insert a row into the MySQL table named transaction and get the gene……

Java

2020-02-22

Java – why does filesystemxmlapplicationcontext throw FileNotFoundException on existing files

resolvent

Java

2020-02-22

Java – sort an array of file names containing numeric strings

For my project, I need to download a zip file from the FTP server. I can publish a new zip about 13 times a year I nee……

Java

2020-02-21

Java – cobertura override and assert keywords

The line coverage of the unit test I measured on cobertura is being affected because I have asserted that it is not co……

Java

2020-02-21

Java – the difference between restful WebService and httpservlet

See the English answer > servlet vs restful 1 Solution Rest is really an architectural style when designing APIs on……

Java

2020-02-21

What is java actually?

I work in selenium. This problem is more specific to Java than selenium The example I provided is selenium webdriver e……

Java

2020-02-21

Simple java date calculation

I want to do simple date calculation in Java For example, calculate the difference in days between dates (with a 0 tim……

Java

2020-02-21

Java: pre, postfix operator takes precedence

I have two similar questions about operator precedence in Java First: int X = 10; System.out.println(X++ * ++X * X++);……

Java

2020-02-21

Java double. MAX_ VALUE？

Hello, I was in my first year of computing system development, so I am very new to Java and have mastered the basic kn……

Java

2020-02-21

Java – JDK 1.7 jarsigner with HTTPS TSA is no longer valid

Looks like JDK 1.7 0_ The Thawte root certificate in 80 was revoked Using 7u80 jarsigner is no longer valid and worked……

Java

2020-02-21

Java bean, BeanUtils and Boolean wrapper classes

I used bean utils to manipulate Java objects created through JAXB, and I encountered an interesting problem Sometimes,……

Java

2020-02-21

Decrypt encrypted assertions using SAML 2.0 in Java using opensaml

There was a problem trying to decrypt encrypted assertions using SAML 2.0 The library I use is opensaml Java library 2……

Java

2020-02-21

Java – analyze JSON map / dictionary with gson?

I need to parse the JSON response: {"key1": "value1","key2": "value2","key3": {"childKey1": "childValue1","childK……

Java

2020-02-21

Java method call expectations

This is a java program with two buttons to change the integer value and display it increase.addActionListener(incListe……

Java

2020-02-21

Java – play framework 2.4 does not accept “public static results” from controllers

I try to start the application using play framework 2.4 and JDK 8 in MAC when I use/ When the activator downloads the ……

Java

2020-02-21

Java – multiple dependency versions in gradle

I'm building a java project that uses gradle for version control I'm starting from the old version of drools rule engi……

Java

2020-02-21

Java – how to calculate the number of instances of a specific class in ArrayList?

I have an array list that looks like: [new Class1(),new Class2(),new Class1(),new Class1()] I want to know the most ef……

Java

2020-02-21

String. Is format (. Net) equivalent in Java?

. Net Format (maybe just VB. Net) converts {0}, {1},... To a determined string, for example: Dim St As String = "Test:……

Java

2020-02-21

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JSF – integer gets the default value 0, which needs to be null in Java

Unit testing – unit testing is worth the effort, in a large and old (5yr) code base?

When adding another object, Java util. ConcurrentModificationException

Java – why do you return false and true?

Java – can spring MVC with JPA be used to update a subset of attributes on an entity?

How to use Java math Commons curvefitter?

Java – stream lists are grouped

Java – performance of log4j

java – IllegalArgumentException readExceptionFromParcel

Multithreading – what is saved in context switching?

Comment – @ singleton in Java EJB

Java – the easiest way to index a collection’s attributes, which are themselves a collection

Java me – how to create a browser window in J2ME?

How to separate lists by using conditions of Java 8 streams

Java – insert the row and get the generated ID

Java – why does filesystemxmlapplicationcontext throw FileNotFoundException on existing files

Java – sort an array of file names containing numeric strings

Java – cobertura override and assert keywords

Java – the difference between restful WebService and httpservlet

What is java actually?

Simple java date calculation

Java: pre, postfix operator takes precedence

Java double. MAX_ VALUE？

Java – JDK 1.7 jarsigner with HTTPS TSA is no longer valid

Java bean, BeanUtils and Boolean wrapper classes

Decrypt encrypted assertions using SAML 2.0 in Java using opensaml

Java – analyze JSON map / dictionary with gson?

Java method call expectations

Java – play framework 2.4 does not accept “public static results” from controllers

Java – multiple dependency versions in gradle

Java – how to calculate the number of instances of a specific class in ArrayList?

String. Is format (. Net) equivalent in Java?

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