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Is main a valid Java identifier?

One of my kids is taking Java in high school and had this on one of his tests: Which of the following is ...

May 18, 2022
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What is “String args[]”? parameter in main method Java

I’m just beginning to write programs in Java. What does the following Java code mean? public static void main(String args) What is String ...

May 11, 2022
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Why is the Java main method static?

The method signature of a Java mainmethod is: public static void main(String...

May 2, 2022
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What should main() return in C and C++?

What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — ...

April 21, 2022
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Can’t execute jar- file: “no main manifest attribute”

I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the ...

April 14, 2022
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What does “Could not find or load main class” mean?

A common problem that new Java developers experience is that their programs fail to run with the error message: Could not find or ...

April 11, 2022
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Can’t execute jar- file: “no main manifest attribute”

I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the ...

April 8, 2022
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What is “String args[]”? parameter in main method Java

In Java args contains the supplied command-line arguments as an array of String objects. In other words, if you run your program as java MyProgram one two then args will contain ["one", "two"]. If ...

April 7, 2022
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What does if name == “main”: do?

What does this do? 40 Short It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend ...

April 6, 2022
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Exception in thread “main” java.lang.ArithmeticException: / by zero

I have two questions about Exceptions. Firstly, I got this message from my code… Exception in thread "main" java.lang.ArithmeticException: / by zero This ...

April 5, 2022
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