// manual boxing vs autoboxing

Integer ii;
int i;
...

// O L D   W A Y : manual boxing

// convert from int to Integer
ii = new Integer(i);

// convert from Integer to int
i = ii.intValue();

...

// N E W   W A Y : autoboxing, conversions are automatically applied.

// convert from int to Integer
ii = i;

// convert from Integer to int
i = ii;