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Function Pointers in Java
...he idea of function pointers from C++. Is there a similar functionality in Java? Given that pointers are somewhat absent, what is the best way about this? And to be clear, we're talking first class here.
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App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件 - Ap...
App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件
刚接触App Inventor 2时，大部分人会被它现成的组件库"惯坏"——想听歌有Player、想拍照有Camera、想存数据有TinyDB。但做着做着就发现，有些需求官方组件...
Which is the best library for XML parsing in java [closed]
I'm searching the java library for parsing XML (complex configuration and data files), I googled a bit but couldn't found other than dom4j (Seems like they are working on V2).. I have taken look at commons configuration but didn't like it, Other apache projects on XML seems under hibernation. I have...
Should I use Java's String.format() if performance is important?
...d + comes ahead of format. by a factor of 5 to 6.
Try it your self
import java.io.*;
import java.util.Date;
public class StringTest{
public static void main( String[] args ){
int i = 0;
long prev_time = System.currentTimeMillis();
long time;
for( i = 0; i< 100000; i++){
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Java Keytool error after importing certificate , “keytool error: java.io.FileNotFoundException & Acc
I'm trying to connect a Java Web API via HTTPS; however, an exception is thrown:
11 Answers
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Run a Java Application as a Service on Linux
I have written a Java server application that runs on a standard virtual hosted Linux solution. The application runs all the time listening for socket connections and creating new handlers for them. It is a server side implementation to a client-server application.
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Java dynamic array sizes?
...;
If you find yourself in this situation, I'd highly recommend using the Java Collections instead. In particular ArrayList essentially wraps an array and takes care of the logic for growing the array as required:
List<XClass> myclass = new ArrayList<XClass>();
myclass.add(new XClass()...
What's the difference between compiled and interpreted language?
...interpreted language is. I was told this is one of the differences between Java and JavaScript. Would someone please help me in understanding it?
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Creating a “logical exclusive or” operator in Java
Java has a logical AND operator.
Java has a logical OR operator.
Java has a logical NOT operator.
17 Answers
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In Clojure 1.3, How to read and write a file
...eally big file.
Number 2: how to read a file line by line.
(use 'clojure.java.io)
(with-open [rdr (reader "/tmp/test.txt")]
(doseq [line (line-seq rdr)]
(println line)))
The with-open macro takes care that the reader is closed at the end of the body. The reader function coerces a string (i...