除了List中重复数据

//去除List中重复数据 
          for(int i=0;i<xxlist_print.size()-1;i++){
        	  Xxk xxk_i=(Xxk) xxlist_print.get(i);
        	  long xxk_i_xxkid=xxk_i.getXxid();
	          for(int j=xxlist_print.size()-1 ;j>i;j--){   
	        	  Xxk xxk_jj=(Xxk) xxlist_print.get(j);
	        	  long xxk_jj_xxkid=xxk_jj.getXxid();
	              if(xxk_i_xxkid == xxk_jj_xxkid){  
	            	 xxlist_print.remove(xxk_jj);  
	               }  
	    	   }    
          }