private PluginData getBetterVersionPlugin(PluginData pdo[]){ 
 PluginData _pdObjs[] = pdo; 
 int len = pdo.length; 
 if(len==0) 
  return null; 
  
 Arrays.sort(_pdObjs,new Comparator() { 
  /**Compares its two arguments for order.  
   * Returns a negative integer, zero, or a positive integer  
   * as the first argument is less than, equal to, or greater than  
   * the second.  
   **/ 
  public int compare(Object leftObj, Object riteObj) { 
    
   String leftPID = ((PluginData)leftObj). 
    getPluginVersion().replace('.', ':'); 
   String ritePID = ((PluginData)riteObj). 
    getPluginVersion().replace('.', ':'); 
   String leftID[] = leftPID.split(":"); 
   String riteID[] = ritePID.split(":"); 
   int maxlen = leftID.length > riteID.length ?  
     leftID.length : riteID.length; 
   for(int i=0; i＜maxlen; i++){ 
    int left = 0; 
    int rite = 0; 
    try { 
    left = new Integer(leftID[i]).intValue(); 
    } catch (NullPointerException e) { left = 0; } 
    try { 
    rite = new Integer(riteID[i]).intValue(); 
    } catch (NullPointerException e) { rite = 0; } 
     
    if(left==rite){ 
     continue; 
    }else{ 
    int bigger = left > rite ? left : rite; 
     if(bigger==left) 
      return 1; 
     if(bigger==rite) 
      return -1; 
    }      
   } 
   return 0; 
  } 
  public boolean equals(Object arg0) { 
   return false; 
  } 
 }); 
  
 return _pdObjs[len-1]; 
  
}