Split up into 2 files for better structure

Passgen/src/main/java/Main.java

@@ -1,13 +1,7 @@
-import java.security.SecureRandom;
-import java.io.IOException;
-import java.nio.file.Paths;
-import java.nio.file.Files;
-import java.util.List;
 import picocli.CommandLine;
 import picocli.CommandLine.Option;
 
 public class Main implements Runnable {
-    private static SecureRandom random;
 
     @Option(names = {"-x", "--xkcd"}, description = "Will generate an xkcd-style password (See xkcd 936)")
     private boolean xkcd = false;
@@ -21,74 +15,28 @@ public class Main implements Runnable {
     @Option(names = {"-h", "--help"}, usageHelp = true, description = "Displays this help message and exits.")
     private boolean help;
 
-    private static String generate_simple_password(int count) {
-        String simpleCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
-        String password = "";
-        int randomIndex;
-        char randomChar;
-        for (int i = 0; i < count; i++) {
-            randomIndex = random.nextInt(simpleCharacters.length());
-            randomChar = simpleCharacters.charAt(randomIndex);
-            password = password + randomChar;
-        }
-        return password;
-    }
-
-    private static String generate_regular_password(int count) {
-        String characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*";
-        String password = "";
-        int randomIndex;
-        char randomChar;
-        for (int i = 0; i < count; i++) {
-            randomIndex = random.nextInt(characters.length());
-            randomChar = characters.charAt(randomIndex);
-            password = password + randomChar;
-        }
-        return password;
-    }
-
-    private static String generate_xkcd_password(int count) {
-            String password = "";
-        try {
-            List<String> dictionary = Files.readAllLines(Paths.get("/usr/share/dict/words"));
-
-            int randomIndex;
-            String randomWord;
-            for (int i = 0; i < count; i++) {
-                randomIndex = random.nextInt(dictionary.size());
-                randomWord = dictionary.get(randomIndex);
-                password = password + randomWord;
-                password = password + " ";
-            }
-        } catch (IOException e) {
-            e.printStackTrace();
-            System.out.println("An error occured while reading /usr/share/dict/words - Is the file present?");
-            System.exit(2);
-        }
-        return password;
-    }
     public static void main(String[] args) {
-        random = new SecureRandom();
         int exitCode = new CommandLine(new Main()).execute(args);
         System.exit(exitCode);
     }
 
     @Override
     public void run() {
+        final Passgen passgen = new Passgen();
         if (xkcd && simple) {
             System.out.println("Error: Only use one of xkcd (-x), simple (-s) or regular (-r) at once.");
             System.exit(2);
         }
         if (xkcd) {
-            System.out.println(generate_xkcd_password(length));
+            System.out.println(passgen.generate_xkcd_password(length));
             System.exit(0);
         }
         else if (simple) {
-            System.out.println(generate_simple_password(length));
+            System.out.println(passgen.generate_simple_password(length));
             System.exit(0);
         }
         else {
-            System.out.println(generate_regular_password(length));
+            System.out.println(passgen.generate_regular_password(length));
             System.exit(0);
         }
     }

Passgen/src/main/java/Passgen.java

@@ -0,0 +1,61 @@
+import java.security.SecureRandom;
+import java.io.IOException;
+import java.nio.file.Paths;
+import java.nio.file.Files;
+import java.util.List;
+
+public class Passgen {
+    private static SecureRandom random;
+
+
+    public String generate_simple_password(int count) {
+        random = new SecureRandom();
+        String simpleCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
+        String password = "";
+        int randomIndex;
+        char randomChar;
+        for (int i = 0; i < count; i++) {
+            randomIndex = random.nextInt(simpleCharacters.length());
+            randomChar = simpleCharacters.charAt(randomIndex);
+            password = password + randomChar;
+        }
+        return password;
+    }
+
+    public String generate_regular_password(int count) {
+        random = new SecureRandom();
+        String characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*";
+        String password = "";
+        int randomIndex;
+        char randomChar;
+        for (int i = 0; i < count; i++) {
+            randomIndex = random.nextInt(characters.length());
+            randomChar = characters.charAt(randomIndex);
+            password = password + randomChar;
+        }
+        return password;
+    }
+
+    public String generate_xkcd_password(int count) {
+        random = new SecureRandom();
+            String password = "";
+        try {
+            List<String> dictionary = Files.readAllLines(Paths.get("/usr/share/dict/words"));
+
+            int randomIndex;
+            String randomWord;
+            for (int i = 0; i < count; i++) {
+                randomIndex = random.nextInt(dictionary.size());
+                randomWord = dictionary.get(randomIndex);
+                password = password + randomWord;
+                password = password + " ";
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+            System.out.println("An error occured while reading /usr/share/dict/words - Is the file present?");
+            System.exit(2);
+        }
+        return password;
+    }
+
+}