modifiers

问题 I'm developing a console application in which I need to detect several hotkeys such as Ctrl + N , Ctrl + O and Ctrl + S . Here's a part of the code that I use to recognize these hotkeys: ConsoleKeyInfo input = Console.ReadKey(true); if (input.Modifiers == ConsoleModifiers.Control) { if (input.Key == ConsoleKey.N) { // ... } else if (input.Key == ConsoleKey.O) { // ... } else if (input.Key == ConsoleKey.S) { //... } } The code above works without any issues for Ctrl + N and Ctrl + O . But, I

问题 I'm developing a console application in which I need to detect several hotkeys such as Ctrl + N , Ctrl + O and Ctrl + S . Here's a part of the code that I use to recognize these hotkeys: ConsoleKeyInfo input = Console.ReadKey(true); if (input.Modifiers == ConsoleModifiers.Control) { if (input.Key == ConsoleKey.N) { // ... } else if (input.Key == ConsoleKey.O) { // ... } else if (input.Key == ConsoleKey.S) { //... } } The code above works without any issues for Ctrl + N and Ctrl + O . But, I

问题 I have a DOS batch file that will create a report listing files contained within a folder tree. The code below produces the desired output for over 115,000 files. However, 13 records are produced with blank date/time and file size. When I manually execute the DIR command (without the /b option), the desired file information is presented. Can this be corrected without adding considerable workaround code? FOR /f "tokens=*" %%A IN ('DIR "<Path>" /a:-d /b /s') DO ( ECHO %%~tA %%~zA %%~dpA %%~nA %

问题 This is my code package alpha ; class A1 { static class A11 { private final // WHAT IS THE EFFECT OF THIS MODIFIER? void fun ( String caller ) { System . out . println ( "A11:\t" + caller ) ; } } static class A12 extends A11 { private void fun ( String caller ) { super . fun ( caller + caller ) ; } } public static void main ( String [ ] args ) { A12 a12 = new A12 ( ) ; a12 . fun ( "Hello" ) ; } } I have found that with or without the final mdifer in A1.A11 the program compiles and runs. I can

问题 Which access modifier, in an abstract class, do I have to use for a method, so the subclasses can decide whether it should be public or not? Is it possible to "override" a modifier in Java or not? public abstract class A { ??? void method(); } public class B extends A { @Override public void method(){ // TODO } } public class C extends B { @Override private void method(){ // TODO } } I know that there will be a problem with static binding, if someone calls: // Will work A foo = new B() foo

问题 I often forget about the regular expression modifiers m and s and their differences. What is a good way to remember them? As I understand them, they are: 'm' is for multiline, so that ^ and $ will match beginning of string and end of string multiple times. (as divided by \n ) 's' is so that the dot will match even the newline character Often, I just use /some_pattern/ism But it probably is better to use them accordingly (usually "s" in my cases). What do you think can be a good way to

问题 I have a few questions on the use of AtTask modifiers. I've been creating an application to pull and push data using the API, and it's been going really well so far -- the documentation is very good and the consistency of the service has been outstanding. I have come up against a few things I wanted to ask about -- it may be that some of these were intentional design choices or limitations, but if not, getting them fixed would lead to drastically fewer API calls (which is a win on both sides)

问题 In java you can use reflection to get an integer representing all the modifiers on a class. For example: public final class Foo{} Foo.getClass().getModifiers();//returns 17 because public=1 and final=16 My question is, what is the best way to compare the modifiers of two classes? Lets say we have another class: private class Bar{} Bar.getClass().getModifiers();//returns 2 because private=2 Now the simple way would be to have a ton of ifs saying modifier.isAbstract, modifier.isPublic, etc. But

问题 I'm handling some MouseEvent in a GUI application using Java Swing. Since now i was analyzing mouse events inside mousePressed method, only to determine if a left or right click happened. My code was: public void mousePressed(MouseEvent me) { if (me.getModifiers == InputEvent.BUTTON1_DOWN_MASK){ //left click }else if (me.getModifiers == InputEvent.BUTTON3_DOWN_MASK){ //right click } Now my application is becoming more complicated and I need also to check if Shift button was pressed while

问题 In c++11 the override specifier protects from not overriding an intended virtual base function (because the signatures do not match). The final specifier protects from unintentionally overriding a function in a derived class. => Is there a specifier (something like maybe first or no_override ) that protects from overriding an unknown base function? I'd like to get a compiler error when a virtual function was added to a base class with the same signature as an already existing virtual function