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How to establish a connection pool in JDBC?
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102
If you need a standalone connection pool, my preference goes to C3P0 over DBCP (that I've menti...
How to add property to a class dynamically?
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340
I suppose I should expand this answer, now that I'm older and wiser and know what's going on. B...
Iterating through a list in reverse order in java
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edited Jan 20 '10 at 15:54
answered Jan 20 '10 at 15:34
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Optimising Android application before release [closed]
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+100
At some point you are going to get to the point where using known tricks will hit their limits. The best thing to do at this point is...
How can I use pointers in Java?
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edited Feb 3 '15 at 14:50
Barracuda
2,12611 gold badge1818 silver badges3838 bronze badges
answered No...
Difference between null and empty (“”) Java String
... can still invoke methods or functions on it like
a.length()
a.substring(0, 1)
and so on.
If the String equals null, like b, Java would throw a NullPointerException if you tried invoking, say:
b.length()
If the difference you are wondering about is == versus equals, it's this:
== compares ...
How to clear variables in ipython?
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208
%reset seems to clear defined variables.
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What is the curiously recurring template pattern (CRTP)?
... You can write
int main()
{
Apple a1;
Apple a2;
a1.size = 10;
a2.size = 10;
if(a1 == a2) //the compiler won't complain!
{
}
}
This could seem that you would write less if you just wrote operator == for Apple, but imagine that the Equality template would provide not...
How can I know if a process is running?
...ocess[] pname = Process.GetProcessesByName("notepad");
if (pname.Length == 0)
MessageBox.Show("nothing");
else
MessageBox.Show("run");
You can loop all process to get the ID for later manipulation:
Process[] processlist = Process.GetProcesses();
foreach(Process theprocess in processlist){
...