in java how to throw exception from function code example
Example 1: throw io exception java
public static void foo() throws IOException {
throw new IOException("error message");
}
public static void main(String[] args) {
try {
foo();
} catch (IOException e) {
System.out.println(e.getMessage());
}
}
Example 2: in java how to throw exception from function
public void doChangePin(int oldPin, int pin) throws Exception {
if (oldPin == pinCode) {
pinCode = pin;
} else {
throw new Exception("some message");
}
}
Example 3: java how to throw exception
public class ThrowException{
public static void main(String [] args) throws Exception{
throw new Exception("Errmessage");
}
}
Example 4: 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");
}
}
Example 5: throw error java
throw new java.lang.Error("this is very bad");
throw new java.lang.RuntimeException("this is not quite as bad");