java - Comparing two set of strings -

here problem. i'm trying compare 2 different string using && , .equals seems cannot give me result should be.

here code (starting think problem is) :

    for(int = 0; < datalist.size(); i+=3)   {                 string temp1 = datalist.get(i);         string temp2 = datalist.get(i+1);          system.out.println(temp1);         system.out.println(temp2);          if (temp1.equals(dataquery1)) {              system.out.println("true");              if (temp2.equals(dataquery2))   {              system.out.println("true");             array2.add((datalist.get(i)));             array2.add((datalist.get(i+1)));             array2.add((datalist.get(i+2)));              }            }      }      system.out.println("\n\narray2 size : " + array2.size());     (int j = 0; j < array2.size(); j++) {          system.out.println("array2 : " + array2.get(j));      } 

this array :

[0]  lipase b [1]  x-33 [2]  ppicz?a [3]  candida antarctica lipase b (calb) [4]  smd1168h [5]  pgap?b [6]  lip 2 [7]  x-33 [8]  ppicz?a 

and result :

lipase b x-33 candida antarctica lipase b (calb) smd1168h lip 2 x-33   array2 size : 0 

the result should :

true true  array2 size : 3 array2 : lipase b array2 : x-33 array2 : ppicz?a 

i tried using if (temp1.equals(dataquery1) && temp2.equals(dataquery2)) doesn't work. if change dataquery1 , dataquery2 value lipase b , x-33 respectively, code works fine.

can help?

by looks of things, you're setting dataquery1 "lipase" when should setting "lipase b". if fix that, correct output:

lipase b x-33 true true candida antarctica lipase b (calb) smd1168h lip 2 x-33   array2 size : 3 array2 : lipase b array2 : x-33 array2 : ppicz?a