Please i need some help with my programing assigment in Java Which one of the fo
ID: 3794420 • Letter: P
Question
Please i need some help with my programing assigment in Java
Which one of the following fragments shows the most appropriate way to throw an exception? Assume that any undeclared variables have been appropriately declared elsewhere and are in scope and have meaningful values. Exception e = new IO Exception("File not found"); if (!f. exists O) {//f is a File object throw e;} if C !f. exists()) {//f is a File object throw new I0Exception("File " + f. getName() + not _ found"); if (!f. exists()) {throw IO Exception; if (!f. exists()) {throw "File not found"; if (!f. exists O) {//f is a File object throw new I0Exception();Explanation / Answer
In the given code of program we are trying to access the external file by checking the condition through exists () function in if statement. We are doing an IO operation on file during the operation something could wrong and a file might not exist. To avoid this situation we need to call IOException is that it is checked exception. It is not mandatory to handle the exception but if you are handle the exception to put a try {...} catch (IOException e) {...} but if you not handle the IO exception you just declare the throws IOException in current method. Consider the part A of the code:
Exception e= new IOException(“file not found”);
If(!f.exists())
{
throw e;
}
In the above given code the new IO exception object is create. In if block the f.exists() function check the condition if the file is exists then it throw exception e but if the condition is false then exception is catch through try and catch block.