No. The block as a whole will get rolled back on failure, but the raise statement on its own does not perform a rollback. For example, this block fails and is implicitly rolled back (exactly as if it was an SQL insert etc): begin insert into demo(id) values(1); dbms_output.put_line(sql%rowcount || ‘ row inserted’); raise program_error; … Read more
{Microsoft Access Driver (*.mdb)} is the name of the older Microsoft Jet driver, which will only work in 32-bit applications. (There are no 64-bit versions of the Jet database engine or the Jet ODBC driver.) To connect with .mdb and .accdb files from a 64-bit application you need to download and install the 64-bit version … Read more
Declare a BattleShip ship1 = null variable at the top of your method and use it: public static int plantNavy(BattleBoard myBattle, int counter) { BattleShip ship1 = null; Do not re-declare the variable in your if blocks, just assign to it. i.e., do if (counter == 0) { ship1 = new LargeShip(false); } not if … Read more
There are some flaws in your code: you should prefer int.TryParse instead of Parse. An Exception should be an unexpected behavior, where you have to react in some way. A userinput is not unexpected, you know there’s a chance that the use inputs invalid data which you can/have to validate. When you use exceptions, you … Read more
It’s not the prettiest of code. Returning a string as a kind of status code is generally bad practice, because you don’t know the range of possible values which can be returned, and what they mean. At the very least consider integer or even enum (which is named). That being said, I would handle the … Read more
Your scanner is getting screwed up if you both use nextLine and next/nextInt/nextDouble refer to this for more Information. I changed your main method accordingly, it now works like you wanted it to. public static void main(String[] args) { Scanner input = new Scanner(System.in); Student s1 = new Student(); System.out.print(“Enter your name: “); s1.name = … Read more
Presumably rhs is empty, and so rhs[0] does not exist. Hence an index out of bounds exception is thrown. Try if(!String.IsNullOrEmpty(rhs) && rhs[0] == ‘+’) … 3 solved Index out of bounds in an if statement [closed]
int arrayfirst[] [] ={{1,2,3},{2,3,4}}; int arraysecound[] [] ={{3,4,5},{6,7,8}}; here, arrayfirst and arraysecound contain two rows and three columns each (The number of inner curly braces separated by Comma signify number of rows, and the numbers written within these inner curly braces signify number of columns), so when you add their elements and try to store … Read more
You can’t put reader.close() between the try and the catch. Either put it in a finally block, or use a try-with-resources. Like, try (BufferedReader reader = new BufferedReader(new FileReader(filenameIn))) { reader.readLine(); for (int i = 0; i < personArray.length; i++) { String[] data = reader.readLine().split(“/t”); // <– should be \\t for tab. personArray[i] = new … Read more
Look at this code… May be it can help you… import java.util.InputMismatchException; //added the import import java.util.Scanner; // added the import class NumberHighException extends Exception { public NumberHighException() {} public NumberHighException(String str) { super(str); } public String toString() { return “NumberHighException”; } } class NumberLowException extends Exception { public NumberLowException() {} public NumberLowException(String str) { … Read more
Exception DATABASE1.MDF’ cannot be opened because it is version 655. This server supports version 612 and earlier. A downgrade path is not supported solved Exception DATABASE1.MDF’ cannot be opened because it is version 655. This server supports version 612 and earlier. A downgrade path is not supported
In class2, you are calling Console.WriteLine(c1.inf1());. So class1.inf1 should return a string as you are trying to output it to the console. However, class1.inf1() recursively calls itself with no exit and does not return a string. So I think this may be what you are trying to accomplish: protected internal string inf1() { return “\n……inf1() … Read more
An Invalid Pointer exception is thrown by the memory manager when it tries to free invalid memory. There are three ways this can happen. The most common is because you’re trying to free an object that you’ve already freed. If you turn on FastMM’s FullDebugMode, it will detect this and point you directly to the … Read more
All the code used to initialize the table model shouldn’t be part of its constructor. Don’t create a class extending DefaultTableModel, and don’t use static variables for the data and columns: you don’t want all the instances of your model to share a unique data vecstor and a unique columns vector. Move all this code … Read more
You are catching InputMismatchException but typing a letter instead of a number raise a NumberFormatException. You can use a generic catchexception: try { } catch(Exception e){ //<– Generic exception } Or use multiple catch block: try { } catch(InputMismatchException | NumberFormatException e ){ //<– Multiple exceptions } Updated to explain why InputMismatchException doesn’t work: That’s … Read more