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In which language are the Java compiler and JVM written?
In which languages are the Java compiler ( javac ), the virtual machine (JVM) and the java starter written?
9 Answers
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_DEBUG vs NDEBUG
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Yes it is a standard macro with the semantic "Not Debug" for C89, C99, C++98, C++2003, C++2011, C++2014 standards. There are no _DEBUG macros in the standards.
C++2003 standard send the reader at "page 326" at "17.4.2.1 Headers"
to standard C.
That NDEBUG is similar as This is the same as the...
C++0x has no semaphores? How to synchronize threads?
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98
someone should submit a proposal to the standards commitee
– user90843
Jun 6 '12 at 23:36
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Rotating a two-dimensional array in Python
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98
Consider the following two-dimensional list:
original = [[1, 2],
[3, 4]]
Lets br...
Where is Java Installed on Mac OS X?
I just downloaded Java 7u17 on Mac OS 10.7.5 from here and then successfully installed it. In order to do some JNI programming, I need to know where Java installed on my Mac.
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What is a Java ClassLoader?
In a few simple sentences, what is a Java ClassLoader, when is it used and why?
7 Answers
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How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
...e JRE the class file is compatible with.
The reported major numbers are:
Java SE 14 = 58,
Java SE 13 = 57,
Java SE 12 = 56,
Java SE 11 = 55,
Java SE 10 = 54,
Java SE 9 = 53,
Java SE 8 = 52,
Java SE 7 = 51,
Java SE 6.0 = 50,
Java SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45
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Tool to read and display Java .class versions
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Use the javap tool that comes with the JDK. The -verbose option will print the version number of the class file.
> javap -verbose MyClass
Compiled from "MyClass.java"
public class MyClass
SourceFile: "MyClass.java"
minor vers...
How to install the JDK on Ubuntu Linux
I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it.
33 A...
Convert java.time.LocalDate into java.util.Date type
I want to convert java.time.LocalDate into java.util.Date type. Because I want to set the date into JDateChooser . Or is there any date chooser that supports java.time dates?
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