包含标签：Java 的文章
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How to download a zip file from the Internet using Java and save it in a specific folder?
This is my code: public static void downloadZipFile() { String saveTo = "C:\\Users\\aria\\Downloads\\Temp"; tr…… -
Java multidimensional arrays are treated as primitives or objects
Yes int [] [] matrix = New Int [10] [10]; A primitive or is it considered an object? When I send it as an argument to …… -
Java – use the base64 class in JDK7
I tried to use the base64 class in JDK7, but the base64 I got could not resolve the error Why does eclipse throw this …… -
Java – finds the second smallest integer in the array
In our assignment, we need to recursively find the second smallest integer in an array However, in order to better und…… -
Java – long press is not applicable to listview
I'm trying to set up a long press listener for listview: final ListView gallery=(ListView)findViewById(R.id.dialogView…… -
Java – throw an exception or block it?
The question is whether it prefers to throw exceptions or prevent exceptions This is a game project The index out of b…… -
Java – how do I convert a string to the int value of the const class?
I have variables: String colorName = "BLUE"; I want to set this color to paint in the Android application It should be…… -
Java – a stored procedure that returns multiple tables to the spring JDBC template
I use the jdbctemplate to call stored procedures from my spring Dao class My problem is that stored procedures return …… -
Problems of enumerating types in Java
I'm new to Java programming and have some problems making enumeration types work In my program, I declare the followin…… -
Java – the result seems wrong
My code will show me that this is not an acceptable input If I insert a negative number Then continue to prompt for in…… -
Java – use XSLT to convert XML to HTML
What I'm doing: I'm trying to convert XML to HTML using XSLT Problem: if the program is executing without any errors, …… -
How to link Java HashMap? How do I access all collision values?
I read somewhere that HashMap uses links to resolve conflicts But if so How to access all elements with the same key v…… -
Java – iterate between two dates, including the start date?
Sorry for asking repeated questions public static void main(String[] args)throws Exception { GregorianCalendar gca…… -
Java – Jersey rest client: publish multipart data
I'm trying to write a Jersey client application that can publish multiple parts of form data to restful Jersey service…… -
Java – how and where should I add an actionlistener to my code?
I wrote the following code with a text field and a button After entering characters and pressing the button, a label i…… -
When executing asynchronous trigger, forget the await statement and forget to use ADO Net to write to the database. Is it safe in c#?
In ASP Net application, I want to log in to the database as efficiently as possible I use basic ADO Net writes to the …… -
Java – periodformatter – how to preset 0 if the hour or minute is exactly one digit?
When I use periodformatter PeriodFormatter formatter = new PeriodFormatterBuilder().appendHours() .app…… -
Java – HashSet contains not applicable to integer
I don't understand why inclusion doesn't work (in fact, if I have passed the custom class, I can revisit my hascode an…… -
How do I determine whether Java generics implement specific interfaces?
How do I determine whether Java generics implement specific interfaces? I tried several different methods, but they al…… -
Java int equation inconsistent?
This drives me crazy because it completely violates my efforts to remove it: int k = keyCode; //keyCode being a variab…… -
Read the value from the format string Java, groovy
I want to know how to read a single attribute from a formatted string in groovy or even Java I have a string containin…… -
Java – put expensive resource creation in static blocks?
I am using JAXB version 2.0 To do this, I create a jaxbcontext object as follows: package com; import javax.xml.bind.…… -
Java – how to cascade and keep only new entities
I am not sure how to set JPA persistence correctly for the following entities (using eclipse link and transaction type…… -
Java – Android – SQLite – select between date1 and date2
Mac OS-X Android Eclipse and ADT SQLite I'm new to creating Android apps. I've done a lot of research on it, but I hav…… -
Java – the best way to convert a numeric array to a CSV string?
If I have a string [] (assuming no comma), I can simply generate a CSV line For example, String[] header = {"header0",…… -
Java – downcasting / upcasting errors at compile time and runtime?
Please check the following procedure I wonder when the compiler will emit a conversion exception at the compiler level…… -
Java – introducing counters into loops in Scala
I'm writing a small program that converts a very large file into multiple smaller files, each of which will contain 10…… -
Java simpledateformat parses timezones, such as America / Los_ Angeles
I want to parse the following string in Java and convert it to a date: DTSTART;TZID=America/Los_Angeles:201@R_403_2407…… -
Java – strange tochararray () behavior
I'm trying to use tochararray () and found some strange behavior Suppose private static final char [] hex_ CHARS =“012…… -
Java – why is an object sometimes null when it is initialized in a thread and accessed from main?
When I create a new object in a thread, it is a property of an object. I give the thread that it remains null in the m…… -
Java – only remove system. Java from the for loops block Out statement
Any method can only easily delete them from the for loop blocks in the file Before: for( ... ) { ... System.out.printl…… -
Java Swing: JTable contains many models and custom renderers
I have a JTable. I recolor the rows according to the values of the model, as shown below: resultTable = new javax.swin……