EXCEPTION HANDLING AND TEXT I/O - Introduction to Java Programming: Comprehensive Version - page 489

*12.6 ( NumberFormatException ) Listing 6.8 implements the hex2Dec(String
hexString) method, which converts a hex string into a decimal number.
Implement the hex2Dec method to throw a NumberFormatException if the
string is not a hex string.
*12.7 ( NumberFormatException ) Write the bin2Dec(String binaryString)
method to convert a binary string into a decimal number. Implement the
bin2Dec method to throw a NumberFormatException if the string is not a
binary string.
*12.8 ( HexFormatException ) Exercise 12.6 implements the hex2Dec method to
throw a NumberFormatException if the string is not a hex string. Define
a custom exception called HexFormatException . Implement the hex2Dec
method to throw a HexFormatException if the string is not a hex string.
*12.9 ( BinaryFormatException ) Exercise 12.7 implements the bin2Dec method
to throw a BinaryFormatException if the string is not a binary string.
Define a custom exception called BinaryFormatException . Implement the
bin2Dec method to throw a BinaryFormatException if the string is not a
binary string.
*12.10 ( OutOfMemoryError ) Write a program that causes the JVM to throw an
OutOfMemoryError and catches and handles this error.
Sections 12.10-12.12
**12.11

VideoNote

HexFormatException

( Remove text ) Write a program that removes all the occurrences of a specified
string from a text file. For example, invoking

java Exercise12_11 John filename

removes the string John from the specified file. Your program should get the
arguments from the command line.

**12.12

( Reformat Java source code ) Write a program that converts the Java source
code from the next-line brace style to the end-of-line brace style. For example,
the following Java source in (a) uses the next-line brace style. Your program
converts it to the end-of-line brace style in (b).

public class Test
{

public class Test {
public static void main(String[] args) {
// Some statements public static void main(String[] args)

{ }

} // Some statements

}
}

(a) Next-line brace style (b) End-of-line brace style

Your program can be invoked from the command line with the Java source-
code file as the argument. It converts the Java source code to a new format. For
example, the following command converts the Java source-code file Test.java
to the end-of-line brace style.

java Exercise12_12 Test.java

*12.13

( Count characters, words, and lines in a file ) Write a program that will count
the number of characters, words, and lines in a file. Words are separated by
whitespace characters. The file name should be passed as a command-line
argument, as shown in Figure 12.13.