What does "Implicit" and "Explicit" means????

-- after reading various Java books, articles, magazines, forums .... etc...
These two words: "Implicit" and "explicit" always appear on every text ...
-- Does implicit means "directly" and explicit means "indirectly"?
thanks

-- after reading various Java books, articles,
magazines, forums .... etc...
These two words: "Implicit" and "explicit" always
ways appear on every text ...
-- Does implicit means "directly" and explicit
licit means "indirectly"?
thanks"implicit" means that something is executed that is not written in your code
"explicit" means that whatever is executed specifically exists in the code.
For instance: "a base class constructor implicitly calls super() if you don't explicitly call super yourself."
That means even though it is not written in the code, the line:
super();
will be executed unless you explictily include a call to super() yourself, such as:
super(10, 14.6, "some text");

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What is implicit and explicit cursor ?

I need to know what is implicit cursor and what is Explict one with a sample source.
Also what is the difference between these two?
Thank you

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http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14261/sqloperations.htm#sthref1274

What does "& 0xFF" and "& 0x0F" mean

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ByteBuffer pixels = ByteBuffer.allocateDirect(256 * 256 * 4);
        for (int i = 0; i < 256; i++) {
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                int value = perm[(j + perm) & 0xFF];
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Say you wanted to store four bytes in an integer. You might be tempted to do this:
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0xFF << 8 = 0000 0000 0000 0000 1111 1111 0000 0000
0xF1 << 0 = 0000 0000 0000 0000 0000 0000 1111 0001
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byte[] bytes = new byte[4];
int x = (bytes[3] & 0xFF)<<24 | (bytes[2] & 0xFF)<<16 | (bytes[1] & 0xFF)<<8 | (bytes[0] & 0xFF);This is just one (extremely verbose) example.

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What does "Implicit" and "Explicit" means????

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