This question already has answers here:
Calling C++ functions from Java
(3 answers)
Closed 8 years ago.
Is there a way to insert some c++ code in java ?
for some reason my code which is:
ArRobotPacket pkt;
pkt.setID(ArCommands::SIM_SET_POSE);
pkt.uByteToBuf(0); // argument type: ignored.
pkt.byte4ToBuf(x);
pkt.byte4ToBuf(y);
pkt.byte4ToBuf(th);
pkt.finalizePacket();
robot.getDeviceConnection()->write(pkt.getBuf(), pkt.getLength());
translated to java, will not function, the write will actually send a packet but doesn't effect the program the way it should
This code is from
http://robots.mobilerobots.com/MobileSim/download/current/README.html#mapobjs
One way is to use Java Native Interface: http://docs.oracle.com/javase/6/docs/technotes/guides/jni/
Related
This question already has answers here:
C# getting its own class name
(11 answers)
Closed 7 years ago.
I am trying to rewrite Java code to C# and I am facing the problem that C# has not got this Java method. Can you please give me the C#'s equivalent of this method or some other way to get the class name.
you can do it like this:
typeof(ClassName).Name
This question already has answers here:
What do 3 dots next to a parameter type mean in Java?
(9 answers)
Closed 7 years ago.
I'm following a java tutorial named "Java Swing first programs" and I noticed something that troubles me. At one point, there's a function written like this:
private void createLayout(JComponent... arg)
I was wandering why there was a ... and what those it do?
The tutorial: http://zetcode.com/tutorials/javaswingtutorial/firstprograms/
See the documentation for Java varargs.
This question already has answers here:
Different behaviour of java bytecode
(6 answers)
Closed 7 years ago.
Why do we have the iconst_* instructions?
Why would I ever want to use these instead of bipush?
I found this StackOverflow question when searching but it does not properly answer my question.
Because a bipush instruction takes two bytes in the bytecode, and an iconst_* instruction takes one byte.
This question already has answers here:
Getting the name of the currently executing method
(23 answers)
Closed 8 years ago.
In C++, you can use __FUNCTION_NAME__ to get the name of the function that contains __FUNCTION_NAME__.
Is there an equivalent in Java? It could, in Java, be possible to do something with this and reflection. Is there something simpler though?
Thread.currentThread().getStackTrace()
will usually contain the method you’re calling it from but there are pitfalls
http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/StackTraceElement.html
Thread.currentThread().getStackTrace()[ste.length - 1 - depth].getMethodName();
depth = 0 (zero) will give current method
also
System.out.println((new Throwable()).getStackTrace()[0].toString());
Sample output:
com.junk.Junk3.main(Junk3.java:12)
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
What is the Java equivalent of Objective-C's NSDictionary?
I've seen other answers but they seem to squabble over each other in terms of response.
I need to translate some Objective-C and I am using NSDictionary a lot. What should I try to use in Java for this ?
The best Java equivalent is a Map implementation specifically HashMap.