包含标签：Java 的文章
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Verify java version compatibility
I have a jar file compiled with JDK 1.7. I want to check whether the Java runtime environment of my jar is 1.7 or upda…… -
Used to represent a number as string, integer All possible characters of Java
In integer In Java, there are the following codes: /** * All possible chars for representing a number as a String */…… -
Java – SSL configuration in Tomcat and APR
I encountered a problem setting my Tomcat using APR native lib, Tomcat: 7.0.42 Java: 1.7.0_40-b43 OS: Centos 6.4 (2.6.…… -
Java – number of elements in ArrayList
How much data can a list can hold at the maximum? 8 Solution ArrayList cannot hold more than integer MAX_ Value is an …… -
Java – NullPointerException reflected when robolectric starts – any hint?
I'm developing an Android project on eclipse and I'm trying to switch from running tests on the simulator / device (ve…… -
Java – is there any way to extract the primary key (or ROWID) using namedparameterjdbctemplate and generatedkeyholder?
I tried to extract ROWID or primary key using spring's namedparameterjdbctemplate and generatedkeyholder I want to do …… -
Java – basic machine learning
I am a novice in machine learning... I am developing a tool in which I need to predict the value of variables accordin…… -
Java – how to use the current date as the input of the function to get the month name
How to create a function to get the current date and return the month name? For example, string MonthName ("September …… -
Is there a Java enum in European countries and languages?
Are there any Java (> 5) enumerations for listing European countries and languages somewhere? But if I can avoid th…… -
Java – what is the difference between jaxp, JDOM, Dom4j and Xerces?
What's the difference between them? It is said that jaxp is just an API specification, which is implemented by JDOM an…… -
Java – can sockets accessed in different programming languages communicate?
Is the socket programming language independent? Can I keep the server written in Java and the client written in C? Sol…… -
Java – the program continues to run despite the interruptedexception
I started learning Java, and now I'm in the concurrency chapter After reading something about concurrency, I tried my …… -
Java – (simple) dateformat, allowing 24:00:00 and 00:00:00 as input
I've been looking for this, but I haven't succeeded so far Do you know if there is a "dateformat" ish class, which wil…… -
2D array problem Java
If I have a 2D array arr [rows] [columns], how can I find the size of rows and columns respectively with arr.length? S…… -
Java – unconditionally execute tasks in ant?
I'm trying to define the task of sending (using echo) messages when the target completes execution, whether the target…… -
Java – sample programs are required to throw interruptedexception
I'm going through Chapter 9 (threads) of Kathy Sierra scjp 1.5, which is mentioned: I just need a sample program to kn…… -
Java – you can specify an integer value for char, but you cannot assign an integer variable to char
Why not compile the following code int n = 5; char c = n; But the following compilation char c = 5; In both cases, don…… -
Display graphics – free Java library
See English answers > drawing graphs on Java [closed] 6 Solution There is an open source version of JGraph -
How to convert TIF to PNG in Java?
What is the best way to convert TIF files to PNG in Java? Simplicity is desirable, but if the easiest way is to use a …… -
Qualified variables for garbage collection in Java
I was preparing for ocpjp, and I was trapped in the following mock exam questions: Whereas: 3. interface Animal { void…… -
Java – when to use doget, dopost, and service
See English answers > doget and dopost in servlets5 >Dopost has no limit on the number of parameters, while doge…… -
How do I change the background color of jtabbedpane?
I know you can modify the LAF properties, but if you don't, how can you do it? I'm just asking, because setbackground …… -
Java – missing twitter4j authentication credentials
I want to use Twitter 4J to tweet in my android app This is my code: //TWITTER SHARE. @Click (R.id. img_btn_twitter) @…… -
How to use guava predictions as a filter in the Java 8 stream API
Guava predictions cannot be used as a filter for the Java 8 streaming API For example, this is not possible: Number fi…… -
Java – Functional Programming: how to handle exceptions or their equivalents in functional programming
Let's say I have the following code public int divide(int dividend,int divisor) { if( divisor == 0 || (dividend ==…… -
Java – the scanner did not scan my input
I'm trying to read a line and then enter the if statement But it will terminate after the first input of red import ja…… -
ActiveX from Java applications?
Can ActiveX controls be easily embedded in Java applications? Is it worth it In my next project, I should use existing…… -
Java – how do I access the configuration files in the jar?
I am using flatpack to parse and load data in flat files This requires loading the configuration file that stores the …… -
Java – why are variables allowed to be declared in a for loop?
I'm a student. I'm learning java at school. I'm confused about it That's what I mean: for (int i = 0; i < 3; i ++) …… -
Java – how to test e-mail logic using play framework
I found an extended mailer course and wanted to test it automatically Using a mock mail program, I can send mail to th…… -
Java – draw simpleweightedgraph on JPanel
I have a simpleweightedgraph that I want to draw on JPanel in JFrame I read this article They are using the listenable…… -
Unable to make Java program run! NoClassDefFoundError?
I am. Net developers, but for my current project, I need to use Google Caja, which is a java project Well, oh! On a Wi……