The try { ... } catch ( ... ) { ... } control structure is used for handling Exceptions.
String age_input = "abc";
try {
int age = Integer.parseInt(age_input);
if (age >= 18) {
System.out.println("You can vote!");
} else {
System.out.println("Sorry, you can't vote yet.");
}
} catch (NumberFormatException ex) {
System.err.println("Invalid input. '" + age_input + "' is not a valid integer.");
}This would print:
Invalid input. ‘abc’ is not a valid integer.
A finally clause can be added after the catch. The finally clause would always be executed, regardless of whether an exception was thrown.
try { ... } catch ( ... ) { ... } finally { ... }
String age_input = "abc";
try {
int age = Integer.parseInt(age_input);
if (age >= 18) {
System.out.println("You can vote!");
} else {
System.out.println("Sorry, you can't vote yet.");
}
} catch (NumberFormatException ex) {
System.err.println("Invalid input. '" + age_input + "' is not a valid integer.");
} finally {
System.out.println("This code will always be run, even if an exception is thrown");
}This would print:
Invalid input. ‘abc’ is not a valid integer.
This code will always be run, even if an exception is thrown