exception

问题 Getting this error since I started changing device for testing. Did some searching and none of it help because they are outdated. Any help is appreciated! xml file <ImageView android:id="@+id/loginpanel" android:layout_width="491px" android:layout_height="210dp" android:layout_marginStart="41dp" android:layout_marginTop="146dp" android:layout_weight="1" android:background="@drawable/loginpanel" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" />

问题 I am new to JDBC and have been playing with it. Other posts in the forum indicate that Oracle's JDBC driver does not support Oracle PLSQL Boolean type. I find that really strange: From the oracle jdbc documentation it seems like it does: But in another section it says it does not allow passing of BOOLEAN parameters to PL/SQL stored procedures. Isn't the the documentation contradicting itself ? It does not let me pass or accept Boolean values from PL/SQL procedures/functions. It gives me the

问题 I am new to JDBC and have been playing with it. Other posts in the forum indicate that Oracle's JDBC driver does not support Oracle PLSQL Boolean type. I find that really strange: From the oracle jdbc documentation it seems like it does: But in another section it says it does not allow passing of BOOLEAN parameters to PL/SQL stored procedures. Isn't the the documentation contradicting itself ? It does not let me pass or accept Boolean values from PL/SQL procedures/functions. It gives me the

问题 It's crashing on the third line inside the do-while loop, and doesn't wait for my input: input = kb.nextInt(); Stack trace: Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Unknown Source) at java.util.Scanner.next(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at main.MainDriver.main(MainDriver.java:50) Relevant code: do { displayFullMenu(); System.out.print("Selection: "); input = kb.nextInt(

问题 It's crashing on the third line inside the do-while loop, and doesn't wait for my input: input = kb.nextInt(); Stack trace: Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Unknown Source) at java.util.Scanner.next(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at java.util.Scanner.nextInt(Unknown Source) at main.MainDriver.main(MainDriver.java:50) Relevant code: do { displayFullMenu(); System.out.print("Selection: "); input = kb.nextInt(

问题 In my application I have used a Map to store POJO objects. As per the requirement I need to iterate over the keySet of the Map and remove objects which dont need any modification. Conside the code below: public void remove(Map<String,User> removeUser){ Set<String> keySet = removeUser.keySey(); User user = null; for(String key : keySet){ user = (user) removeUser.get(key); if(!user.isActive()){ removeUser.remove(key); } } } Here in above code, I am getting ConcurrentModificationException when I

问题 Trying to delete a subkey tree: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.hdr . .hdr subkey has one subkey, no values. So I use this code: RegistryKey FileExts = Registry.CurrentUser.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts"); RegistryKey faulty = FileExts.OpenSubKey(".hdr"); Debug.Assert (faulty != null && faulty.SubKeyCount != 0); faulty.Close(); FileExts.DeleteSubKeyTree(".hdr"); And I get the ArgumentException with

问题 I make game. In //ERROR ZONE is called Exception. I don't understand it. Class game has List recrangles. void spawnt(){ var rnd = new Random(); var rnd2 = new Random(); rnd = rnd.nextInt(100); if(rnd2.nextBool()) rnd2 = rnd2.nextInt(100); else rnd2 = -rnd2.nextInt(100); var x = flappy.position["x"]+lastx+sw+rnd; var y = rnd2*pomer-100-1800*pomer-168*pomer; Rectangle vrch = new Rectangle("img/tube1.png", sw, sh, {"x":x, "y":y, "z":0}); Rectangle spodek = new Rectangle("img/tube2.png", sw, sh,

问题 What is the best way to throw exception from the constructor initializer? For example: class C { T0 t0; // can be either valid or invalid, but does not throw directly T1 t1; // heavy object, do not construct if t0 is invalid, by throwing before C(int n) : t0(n), // throw exception if t0(n) is not valid t1() {} }; I thought maybe making wrapper, e.g. t0(throw_if_invalid(n)) . What is the practice to handle such cases? 回答1: There are multiple ways of going about this, I think. From what I

问题 I'm having some trouble with exceptions not functioning correctly (or at least, as I would hope; I know there are issues with this) across shared libraries when loaded using dlopen . I include some simplified example code here. The actual situation is myapp =Matlab, myext1 =mexglx matlab extension, mylib is a shared library of my code between the two extensions ( myext1 , myext2 ) mylib.h struct Foo { Foo(int a); m_a; } void throwFoo(); mylib.cpp #include "mylib.h" Foo::Foo(int a): m_a(a) {}