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4 Text File InputOutput4 1 Explain what happens if you try to ope

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4 Text File Input/Output
4.1 Explain what happens if you try to open a file for
reading that does not exist.
4.2 Explain what happens if you try to open a file for
writing that does not exist
. 4.3 Name your source code file Hw1_1.java. Write a
program that prompts the user for the name of a Java
source code file. The program shall read the source code
file and output the contents to a new file named the same
as the input file, but with a .txt file name extension (e.g., if
the input file is foo.java then the output file shall be named
foo.java.txt). Each line of the input file shall be numbered
with a line number (formatted as shown below) in the
output file. For example, if the user enters Hw1_1.java as
the name of the input file and Hw1_1.java contains:
//***************************************************************
//
CLASS: Hw1_1 (Hw1_1.java)
//***************************************************************
public class Hw1_1 { public static void main(String[] pArgs)
{ }
public Hw1_1() { } } then the contents of the output file
Hw1_1.java.txt would be:
[001]
//***************************************************************
[002] // CLASS: Hw1_1 (Hw1_1.java) [003]
//***************************************************************
[004] public class Hw1_1
{ [005] public static void main(String[] pArgs) { [006] }
[007] public Hw1_1()
{ [008] }
[009] } Hint: to print an integer as shown above in a field of
width 3 with leading 0\'s use the printf() method with a
format specifier of %03d.

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4 Text File Input/Output 4.1 Explain what happens if you try to open a file for reading that does not exist. 4.2 Explain what happens if you try to open a file for writing that does not exist . 4.3 Name your source code file Hw1_1.java. Write a program that prompts the user for the name of a Java source code file. The program shall read the source code file and output the contents to a new file named the same as the input file, but with a .txt file name extension (e.g., if the input file is foo.java then the output file shall be named foo.java.txt). Each line of the input file shall be numbere ...
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