Java Throws Exception Statement Example

Chapter: Exception Handling Last Updated: 08-06-2017 14:04:15 UTC

Program:

            /* ............... START ............... */
                
public class JavaThrowsDemo {
	static void throwOne() throws IllegalAccessException {
		System.out.println("Inside throwOne.");
		throw new IllegalAccessException("demo");
	}

	public static void main(String args[]) throws IllegalAccessException {
		throwOne();
	}
}

class ThrowsDemo {
	static void throwOne() throws IllegalAccessException {
		System.out.println("Inside throwOne.");
		throw new IllegalAccessException("demo");
	}

	public static void main(String args[]) {
		try {
			throwOne();
		} catch (IllegalAccessException e) {
			System.out.println("Caught " + e);
		}
	}
}

                /* ............... END ............... */
        

Output

Inside throwOne.Exception in thread "main" 
java.lang.IllegalAccessException: demo
	at ExceptionHandling.JavaThrowsDemo.throwOne(JavaThrowsDemo.java:20)
	at ExceptionHandling.JavaThrowsDemo.main(JavaThrowsDemo.java:24) 

Notes:

  • All Java methods use the throw statement to throw an exception. The throw statement requires a single argument: a throwable object. In the Java system, throwable objects are instances of any subclass of the Throwable.
  • The Java throws keyword is used to declare an exception.
  • All methods use the throw statement to throw an exception.

Tags

Java Throws, Exception Handling, Java

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