Exception is a situation in Java wherein the system is behaving in a not-so-correct way or rather the system is behaving in an erroneous way. Exceptions are handled using try-catch blocks.
Ex:
try {
int x = 10/0;
} catch (Exception e) {
e.printStackTrace();
}
Here we are performing an illegal operation by dividing 10/0 which will throw a numeric exception which will be caught and handled inside the catch block
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In object-oriented programming languages, a member function is one which belongs to a class.
An exception is literally that: an exception. Exceptions are thrown when something that shouldn't happen does. For example, if you're trying to turn "Hi" into an Integer, you'll get a NumberFormatException (in Java.) If there is nothing in place to handle an exception, the program will crash. Try-catch blocks are used for exception handling within methods, and exception throwing is used to give out exceptions, or let a different method handle it. Example program (Java): class ex{ public static void main(String[] args){ String Strx = "5a"; int x = 0; try{ x += Integer.parseInt(Strx); }catch(NumberFormatException e){ // If Strx is not an Integer x += Integer.parseInt("5"); } System.out.println("The value of x is " + x); // The value of x is 5 } } Alternatively, you could remove the try-catch blocks, and simply write "public static void main(String[] args) throws NumberFormatException" in the 2nd line of the program.
Indents are not necessary for simple if statements: if (true) /* do something */ ; else /* do something */; However, when a statement is a compound statement, it's best to place the statement body on a separate line and indent it: if (true) { /* do something */ ; /* do something */ ; /* do something */ ; } else { /* do something */; /* do something */; } The indents help the reader; separating the controlling expressions from the compound statements and thus exposing the structure of the if statement itself.
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To solve certain problems that can't be solved with simple algebra. To give just one simple example, find the maximum value of a certain function.To solve certain problems that can't be solved with simple algebra. To give just one simple example, find the maximum value of a certain function.To solve certain problems that can't be solved with simple algebra. To give just one simple example, find the maximum value of a certain function.To solve certain problems that can't be solved with simple algebra. To give just one simple example, find the maximum value of a certain function.
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