You can define your own exception class for your application specific purposes. The exception class is created by extending the java.lang.Exception
class for checked exception or java.lang.RuntimeException
for unchecked exception. By creating your own Exception classes, you could identify the problem more precisely.
package org.kodejava.example.fundamental;
public class CustomExceptionExample {
public static void main(String[] args) {
int x = 1, y = 0;
try {
int z = CustomExceptionExample.divide(x, y);
System.out.println("z = " + z);
} catch (DivideByZeroException e) {
e.printStackTrace();
}
}
public static int divide(int x, int y) throws DivideByZeroException {
try {
return (x / y);
} catch (ArithmeticException e) {
String m = x + " / " + y + ", trying to divide by zero";
throw new DivideByZeroException(m, e);
}
}
}
class DivideByZeroException extends Exception {
DivideByZeroException() {
}
DivideByZeroException(String message) {
super(message);
}
DivideByZeroException(String message, Throwable cause) {
super(message, cause);
}
}
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