Java:sort

Bonjour,

import javax.swing.*; 
public class Extra_1  
{ 
  private static int user_feedback; 
public static void main(String[]args) 
  { 
   String output="index\n"; 
   int array_first[]=length(); 
   int array_second[]=length(); 
   create_first(array_first); 
   create_second(array_second); 
   int added_array[]=new int[array_first.length+array_second.length]; 
   added(array_first,array_second,added_array); 
   sort(added_array);
    
   for(int counter=0;counter<added_array.length;counter++) 
    output+=added_array[counter]+"\n"; 
    
   print(output); 
  } 
     
 public static void create_first(int array1[]) 
    { 
     for(int counter=0;counter<array1.length;counter++) 
      array1[counter]=input(counter); 
    } 
    public static void create_second(int array3[]) 
    { 
     for(int counter=0;counter<array3.length;counter++) 
      array3[counter]=input(counter); 
    } 
    public static int[]length() 
    { 
     int user_feeback=Integer.parseInt(JOptionPane.showInputDialog(null,"Enter the length of array")); 
     return new int[user_feedback]; 
    } 
    public static int input(int number) 
    { 
     return number=Integer.parseInt(JOptionPane.showInputDialog(null, "Enter"+number+"the element of array")); 
      
    } 
    public static void added(int array_1[],int array_2[],int array_added[]) 
   
    { 
     int counter; 
     int count; 
     for(counter=0;counter<array_1.length;counter++) 
     { 
      array_added[counter]=array_1[counter]; 
      System.out.println(array_added[counter]); 
       
      for(count=0;count<array_2.length;count++) 
      { 
       array_added[count+array_1.length]=array_2[count]; 
       System.out.println(array_added[count+array_1.length]); 
      } 
     } 
      
     public static void sort(int sorting_array[]) 
     { 
      for(int pass=1;pass<sorting_array.length;pass++)//loop to control number of passes 
       for(int counter1=0;counter<sorting_array.length-1-(pass-1);counter++) 
       
       if(sorting_array[counter]>sorting_array[counter+1])//compare 
        swap(sorting_array,sorting_array[counter],sorting_array[counter+1]); 
     } 
    } 
    public static void swap(int swappingArray[],int number1,int number2) 
    { 
     int temp=number1; 
     number1=number2; 
     number2=temp; 
    } 
    public static void print(String element) 
    { 
     JTextArea outputArea=new JTextArea(); 
     outputArea.setText(element); 
     JOptionPane.showMessageDialog(null, outputArea,"Arrays",JOptionPane.INFORMATION_MESSAGE); 
    }   
    } 

j'ai erreur suivante:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method sort(int[]) is undefined for the type Extra_1

at Extra_1.main(Extra_1.java:14)
la lige 14 est:
sort(added_array)

pourtant la ligne qu'il est indiqué,je crois que j'ai écrit bien
public static void sort(int sorting_array[])

aidez moi svp