NestTry.java

/**
 * 
 * DevCans - Java A-to-Z Resources
 * @author - Java: The Complete Reference - Herbert Schildt
 * 
 */

// An example of nested try statements.
class NestTry {
    public static void main(String args[]) {
        try {
            int a = args.length;
            /* If no command-line args are present,
            the following statement will generate
            a divide-by-zero exception. */
            int b = 42 / a;
            System.out.println("a = " + a);
            try { // nested try block
                /* If one command-line arg is used,
                then a divide-by-zero exception
                will be generated by the following code. */
                if(a==1)
                    a = a/(a-a); // division by zero
                /* If two command-line args are used,
                then generate an out-of-bounds exception. */
                if(a==2) {
                    int c[] = { 1 };
                    c[42] = 99; // generate an out-of-bounds exception
                }
            } catch(ArrayIndexOutOfBoundsException e) {
                System.out.println("Array index out-of-bounds: " + e);
            }
        } catch(ArithmeticException e) {
            System.out.println("Divide by 0: " + e);
        }
    }
}