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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++){
...
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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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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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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How can I avoid Java code in JSP files, using JSP 2?
I'm new to Java EE and I know that something like the following three lines
31 Answers
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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()...
ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file
...e.
For example, on my Windows 7 machine, it is in
C:\Program Files (x86)\Java\jre6\bin, and my %PATH% variable looks like C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Java\jre6\bin;C:\WINDOWS\System32\WindowsPowerShell\v1.0\ (and many other entries)
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Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
I see java.util.function.BiFunction, so I can do this:
7 Answers
7
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Run class in Jar file
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Use java -cp myjar.jar com.mypackage.myClass.
If the class is not in a package then simply java -cp myjar.jar myClass.
If you are not within the directory where myJar.jar is located, then you can do:
On Unix or Linux platfor...
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...