throw io exception java
public static void foo() throws IOException {
// some code here, when something goes wrong, you might do:
throw new IOException("error message");
}
public static void main(String[] args) {
try {
foo();
} catch (IOException e) {
System.out.println(e.getMessage());
}
}throw error java
throw new java.lang.Error("this is very bad");
throw new java.lang.RuntimeException("this is not quite as bad");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");
}
}try catch in java
try block: code that is protected for any exceptions. and it is mandatory
(only try)
catch block: if any exception happens during runtime in the try block,
the catch block will catch that exception.
if any exception happens during runtime in the try block,
control will be given to catch block.
An optional finally block gives us a chance to run the code which
we want to execute EVERYTIME a try-catch block is completed
– either with errors or without any error.Copyright © 2021 Codeinu
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