<qiyuangong>215_Kth_Largest_Element_in_an_Array_1.java
private void exch(int[] a, int i, int j) {
        final int tmp = a[i];
        a[i] = a[j];
        a[j] = tmp;
    }
private void var_0 ( int [ ] var_1 , int var_2 , int var_3 ) {
  final int var_4 = var_1 [ var_2 ] ;
  var_1 [ var_2 ] = var_1 [ var_3 ] ;
  var_1 [ var_3 ] = var_4 ;
}
