Shift, bitwise OR operation? ? ?

RT
Newbie question ...

I have a button in the following operations:

 
Button btnClear = (Button) findViewById (R.id.btnClear); 
btnClear.setOnClickListener (new Button.OnClickListener () 
{
@ Override 
public void onClick (View v) 
{
etMsgShow.setText (""); 

byte [] bytes = new byte [2]; 
bytes [0] = (byte) 221; 
bytes [1] = 7; 
int i1 = (bytes [1] << 8); 
int i2 = bytes [0]; 
int i = i1 | i2; 
etMsgShow.append (
Integer.toString (i1) + "," 
+ Integer.toString (i2) + "," 
+ Integer.toString (i) + "\ r \ n"); 
} 
}); / / BtnClear 

Why is this information output:? ? ?



Why i is -35? ?
Phenomenon I want to achieve is the result of i 2013, how should I do? ? ?

ps: 221 ==> 0xDD; 2013 ==> 0x7DD.

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Reply:
kao java complement binary form
Reply:
There is no Java primitive types unsigned type, byte int to be able to be replaced
Reply:

 int i1 = (bytes [1] << 8) & 0x0000ff00; 
int i2 = bytes [0] & 0x000000ff; 

To do so.