Are the System supplied methods implemented with Java? If so, how could I make my own println?

[vague junco]

<@&987246399047479336> please have a look, thanks.

[coral raft]

The System class is indeed written in Java, but if you looked more precisely in the sources, the Java code will end up calling native function

[tribal gull]

do you have an example?

[coral raft]

No, not now, since im not on PC

[silver ridge]

the jdk is opensource, u can lookup the source code urself

here is the link:

https://github.com/openjdk/jdk

example:

https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/lang/String.java

in some cases ull eventually end up at a method marked native

for example String#intern

the mechanism for this is called JNI

its javas way to call code implemented in C/C++

(u can ofc use that mechanism urself as well, making ur own native methods)

anyways, those methods are implemented in C/C++

u essentially just have to call System.loadLibrary("myLib.dll") somewhere

and then all methods inside there are available and linked against their native counterparts

these native methods are then typically the methods using platform specific code

so for example when the windows api has to be used

for example reading/writing a file is a platform specific operation

java offers it to u in a platform agnostic way but eventually it has to call the actual platform specific way to do it on ur current platform

[vague junco]

@tribal gull

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