Update OOP/Java/Lab/Week9/palin_alpha_rev_concat.java

OOP/Java/Lab/Week9/palin_alpha_rev_concat.java

@@ -1,29 +1,26 @@
 import java.util.Scanner;
+import java.util.Arrays;
+
 class palin_alpha_rev_concat{
     static boolean palindrome(String str)
     {
         String rev=reverse(str);
         return str.contentEquals(rev);
     }
-    static String[] alphabetic(String str)
-    {
-        String arr[]=str.split(" ");
-        for(int i=0;i<arr.length-1;i++)
-        {
-            for(int j=0;j<arr.length-i-1;j++)
-            {
-                int a=arr[j].compareTo(arr[j+1]);
-                if(a>0)
-                {
-                    String temp=arr[j];
-                    arr[j]=arr[j+1];
-                    arr[j+1]=temp;
-                }
-            }
-        }
-        return arr;
 
+    static String[] alphabetic(String str) {
+        char[] arr = str.toCharArray(); 
+        Arrays.sort(arr); 
+        String sortedStr = new String(arr); 
+        
+        String[] result = new String[sortedStr.length()];
+        for (int i = 0; i < sortedStr.length(); i++) {
+            result[i] = String.valueOf(sortedStr.charAt(i)); 
+        }
+        
+        return result; 
     }
+    
     static String reverse(String str)
     {
         StringBuffer rev=new StringBuffer(str);
@@ -52,13 +49,11 @@ class palin_alpha_rev_concat{
                     System.out.println("String is a palindrome:"+palindrome(str));
                     break;
                 }
-                case 2:
+                case 2: {
-                {
+                    String arr[] = alphabetic(str); 
-                    String arr[]=alphabetic(str);
                     System.out.println("String in alphabetic order:");
-                    for(int i=0;i<arr.length;i++)
+                    for (int i = 0; i < arr.length; i++) {
-                    {
+                        System.out.print(arr[i]); 
-                        System.out.print(arr[i]+" ");
                     }
                     System.out.println();
                     break;