java throw an exception
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
System.out.println("Enter a number");
try {
double nb1 = kb.nextDouble();
if(nb1<0)
throw new ArithmeticException();
else System.out.println( "result : " + Math.sqrt(nb1) );
} catch (ArithmeticException e) {
System.out.println("You tried an impossible sqrt");
}
}exception in java
In java exception is an object. Exceptions are created when an abnormal
situations are arised in our program. Exceptions can be created by JVM or
by our application code. All Exception classes are defined in java.lang.
In otherwords we can say Exception as run time error. I use try & catch blocks
to handle any exceptions in my code.
I am familiar with major checked and unchecked exceptions and
handle it accordingly to make my code execution smoothexception java
1.Unchecked: occurs during run time
2.Checked Exceptions:occurs during the compile time.
needs to be handled IMMEDIATELY
Exception handling: try & catch: blocks, used for handling the exception
throws keyword is used within the method signature
disadvantage is: throws keyword whoever calls the method
will have to handle the exception again but with
try/catch you handle once. Try/catch is better way to handle it
in utility class. Next time you call method you don’t get any exceptions
most common Exception like NullPointerExceptio,
ArrayIndexOutOfBound, ClassNotFoundException, IOException.
are unchecked and they are descended from java.lang.RuntimeException
In Selenium: nosuchelement, nostaleexception, nosuchaframe
In SQL: SQL exceptionCopyright © 2021 Codeinu
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