scg/ch10/EchoFileFANG

01 packagepackage is used to name the directory or folder a class is in scg.ch10;
02 
03 importimport means to make the classes and/or packages available in this program java.io.File;
04 importimport means to make the classes and/or packages available in this program java.io.FileNotFoundException;
05 importimport means to make the classes and/or packages available in this program java.util.Scanner;
06 
07 importimport means to make the classes and/or packages available in this program fang2.core.Game;
08 importimport means to make the classes and/or packages available in this program fang2.sprites.InputStringField;
09 
10 /**
11  * A program which reads its command-line arguments, treating each as
12  * the name of a file. An EchoFile object reads its file one line at a
13  * time and echos them to standard output.
14  */
15 publicpublic is used to indicate unrestricted access (any other class can have access) classclass is a group of fields and methods used for making objects EchoFileFANG
16   extendsextends means to customize or extend the functionality of a class Game {open braces start code blocks and must be matched with a close brace
17   privateprivate is used to restrict access to the current class only File file;
18   InputStringField iss;
19   @Override
20   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value advance(doubledouble is the type for numbers that can contain decimal fractions dT) {open braces start code blocks and must be matched with a close brace
21   }close braces end code blocks and must match an earlier open brace
22 
23   /**
24    * Echo the file to standard output. If there is a problem with the
25    * file not existing or not being readable by the current user, an
26    * appropriate error message should be printed.
27    */
28   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value echo(File file) {open braces start code blocks and must be matched with a close brace
29     ifif executes the next statement only if the condition in parenthesis evaluates to true (file.exists() &this performs a bit-wise and (not the same as boolean and which is &&)&this performs a bit-wise and (not the same as boolean and which is &&) file.canRead()) {open braces start code blocks and must be matched with a close brace
30       trytry is for executing a code block that may experience exceptions (errors) {open braces start code blocks and must be matched with a close brace
31         Scanner echoScanner =this assignment operator makes the left side equal to the right side newnew is used to create objects by calling the constructor Scanner(file);
32         String line;
33         whilewhile is a looping structure for executing code repeatedly (echoScanner.hasNextLine()) {open braces start code blocks and must be matched with a close brace
34           line =this assignment operator makes the left side equal to the right side echoScanner.nextLine();
35           System.out.println(line);
36         }close braces end code blocks and must match an earlier open brace
37         echoScanner.close();
38       }close braces end code blocks and must match an earlier open brace catchcatch means to handle an exception that may occur (FileNotFoundException e) {open braces start code blocks and must be matched with a close brace
39         System.out.println("PANIC: This should never happen!");
40         e.printStackTrace();
41       }close braces end code blocks and must match an earlier open brace
42     }close braces end code blocks and must match an earlier open brace elseelse is what happens when the if condition is false {open braces start code blocks and must be matched with a close brace
43       System.out.println("Unable to open \"" +adds two numbers together or concatenates Strings together file.getName() +adds two numbers together or concatenates Strings together
44         "\" for input");
45     }close braces end code blocks and must match an earlier open brace
46   }close braces end code blocks and must match an earlier open brace
47 
48   @Override
49   publicpublic is used to indicate unrestricted access (any other class can have access) voidvoid means the method does not return a value setup() {open braces start code blocks and must be matched with a close brace
50   }close braces end code blocks and must match an earlier open brace
51 }close braces end code blocks and must match an earlier open brace
52 
53 //Uploaded on Mon Mar 29 21:38:37 EDT 2010