how do i exit a for loop in an if else statement? groovy - java

my code work fine until i add the else bit

String getInputSearch = JOptionPane.showInputDialog("city")

       for(int i=0; i < listArray.length; i++) {
         if(getInputSearch == loadData()[i][0]) {
         for(int j=0; j< loadData()[i].length; j++) {
            println(loadData()[i][j])
            }
             println("")
        }
        else{
            println( getInputSearch+ "not a valid city");
     }

   }

if i add a break to the else bit, the loop only works once and if i dont it keeps printing not a valid city, even if the city is valid until it reaches the the right index in the array. (data is read from a text file btw) help would be appreciated.