|
Directory |
|
1 // joi/4/textfiles/Directory.java 2 // 3 // 4 // Copyright 2003 Ethan Bolker and Bill Campbell 5 6 // This draft contains just stubs for the methods. 7 // You can invoke them all, but none will do anything. 8 9 /** 10 * Directory of TextFiles. 11 * 12 * @version 4 13 */ 14 15 public class Directory 16 { 17 /** 18 * Construct a Directory. 19 */ 20 21 public Directory( ) 22 { 23 } 24 25 /** 26 * The size of a directory is the number of TextFiles it contains. 27 * 28 * @return the number of TextFiles. 29 */ 30 31 public int getSize() 32 { 33 return 0; 34 } 35 36 /** 37 * Add a TextFile to this Directory. Overwrite if a TextFile 38 * of that name already exists. 39 * 40 * @param name the name under which this TextFile is added. 41 * @param afile the TextFile to add. 42 */ 43 44 public void addTextFile(String name, TextFile afile) 45 { 46 } 47 48 /** 49 * Get a TextFile in this Directory, by name . 50 * 51 * @param filename the name of the TextFile to find. 52 * @return the TextFile found, null if none. 53 */ 54 55 public TextFile retrieveTextFile( String filename ) 56 { 57 return null; 58 } 59 60 /** 61 * Get the contents of this Directory as an array of 62 * the file names, each of which is a String. 63 * 64 * @return the array of names. 65 */ 66 67 public String[] getFileNames() 68 { 69 // pseudocode for an implementation: 70 // declare an array of String 71 // create that array with as many spaces as there 72 // are TextFile's in this Directory 73 // loop through the keys of the TreeMap of TextFiles, 74 // adding each String key to the array 75 // return the array 76 77 // the next line is there because we have to return 78 // _something_ in order to satisfy the compiler 79 return new String[0]; 80 } 81 82 /** 83 * main, for unit testing. 84 * 85 * The command 86 * <pre> 87 * java Directory 88 * </pre> 89 * should produce output 90 * <pre> 91 * bill 17 Sun Jan 06 19:40:13 EST 2003 diary 92 * eb 12 Sun Jan 06 19:40:13 EST 2003 greeting 93 * </pre> 94 * (with current dates, of course). 95 */ 96 97 public static void main( String[] args ) 98 { 99 Directory dir = new Directory(); 100 dir.addTextFile("greeting", new TextFile("eb", "Hello, world")); 101 dir.addTextFile("diary", new TextFile("bill", "Writing Directory")); 102 // now list TextFiles in dir to get output specified 103 } 104 } 105
|
Directory |
|