What is the difference between the throw statement and the throws clause?

throw and throws represent different constructs in Java programming language.

Explanation:

throw is used to explicitly throw an Exception from within a code segment.

For example:

public void throw_test(String str){

        if(str==null) throw new NullPointerException();

}

throws is used to specify an exception list which may be thrown by a method:

For example:

public String readFromFile(File f) throws IOException {

// Some code fragment which could throw a IOException

}

system programmer option d is correct

because an operating system is software that manages computer hardware and system resources.

to change your username, you must:

1) make sure what the username you want to change to is allowed in this community

2) contact a administrator (for example, jaysl)

3) through pm, tell the admin what you want to change to

4) if the username is allowed, it will be changed in a matter of seconds (minutes at most)

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