Add second year

second/semester1/CT255/Assessment/CT255-Assignment-3/ogStegano1.java

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+
+/**
+ * CT255 - Assignment 3
+ * Skeleton code for Steganography assignment.
+ *
+ * @author Michael Schukat 
+ * @version 1.0
+ */
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class Stegano1
+{
+    /**
+     * Constructor for objects of class Stegano1
+     */
+    public Stegano1()
+    {
+    }
+
+    public static void main(String[] args) {
+        String arg1, arg2, arg3, arg4;
+        Boolean err = false;
+        
+        if (args != null && args.length > 1) { // Check for minimum number of arguments
+            arg1 = args[0];
+            arg2 = args[1];
+                
+            if (arg2 == "") {
+                err = true;
+            }
+            else if ((arg1 == "A") && (args.length > 3)){
+                // Get other arguments
+                arg3 = args[2];
+                arg4 = args[3];
+                if (arg3 == "" || arg4 == "") {
+                    err = true;
+                }
+                else {
+                    // Hide bitstring
+                    hide(arg2, arg3, arg4);
+                }
+            }
+            else if (arg1 == "E"){
+                // Extract bitstring from text   
+                retrieve(arg2);   
+            }
+            else {
+                err = true;
+            }
+        }
+        else {
+            err = true;
+        }
+        
+        if (err == true) {
+            System.out.println();
+            System.out.println("Use: Stegano1 <A:E><Input File><OutputFile><Bitstring>");
+            System.out.println("Example: Stegano1 A inp.txt out.txt 0010101");
+            System.out.println("Example: Stegano1 E inp.txt");
+            
+        } 
+    }
+    
+    static void hide(String inpFile, String outFile, String binString) {
+        // 
+        BufferedReader reader;
+        BufferedWriter writer;
+	
+        try {
+            reader = new BufferedReader(new FileReader(inpFile));
+            writer = new BufferedWriter(new FileWriter(outFile));
+            String line = reader.readLine();
+            while (line != null) {
+                // Your code starts here
+                
+                
+                // Store amended line in output file
+                writer.write(line);
+                writer.newLine();
+		// read next line
+		line = reader.readLine();
+            }
+            reader.close();
+            writer.close();
+	} catch (IOException e) {
+	    e.printStackTrace();
+	}
+
+    }
+    
+    static void retrieve(String inpFile) {
+        BufferedReader reader;
+	
+        try {
+            reader = new BufferedReader(new FileReader(inpFile));
+            String line = reader.readLine();
+            while (line != null) {
+                // Your code starts here
+                
+                // System.out.println(line);
+                
+		// read next line
+		line = reader.readLine();
+            }
+            reader.close();
+	} catch (IOException e) {
+	    e.printStackTrace();
+	}
+
+    }
+}