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Callback functions in Java
... b) {
return a*b;
}
};
System.out.println(adder.doJob(10, 20));
System.out.println(multiplier.doJob(10, 20));
}
}
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Java Runtime.getRuntime(): getting output from executing a command line program
...commands from my Java program. However, I'm not aware of how I can get the output the command returns.
12 Answers
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How to send PUT, DELETE HTTP request in HttpURLConnection?
...onnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setRequestMethod("PUT");
OutputStreamWriter out = new OutputStreamWriter(
httpCon.getOutputStream());
out.write("Resource content");
out.close();
httpCon.getInputStream();
To perform an HTTP DELETE...
Numpy where function multiple conditions
...ur question:
You don't actually need where if you're just trying to filter out the elements of dists that don't fit your criteria:
dists[(dists >= r) & (dists <= r+dr)]
Because the & will give you an elementwise and (the parentheses are necessary).
Or, if you do want to use where f...
break out of if and foreach
...h loop and an if statement. If a match is found i need to ultimately break out of the foreach.
4 Answers
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Can I redirect the stdout in python into some sort of string buffer?
...l FTP client, but some of the functions in the package don't return string output, but print to stdout . I want to redirect stdout to an object which I'll be able to read the output from.
...
Abstract class in Java
...public void abstractMethod();
public void implementedMethod() { System.out.print("implementedMethod()"); }
final public void finalMethod() { System.out.print("finalMethod()"); }
}
Notice that "abstractMethod()" doesn't have any method body. Because of this, you can't do the following:
pu...
How can I convert String to Int?
...tBoxD1.Text);
or better yet:
int x = 0;
Int32.TryParse(TextBoxD1.Text, out x);
Also, since Int32.TryParse returns a bool you can use its return value to make decisions about the results of the parsing attempt:
int x = 0;
if (Int32.TryParse(TextBoxD1.Text, out x))
{
// you know that the p...
Iterate through a HashMap [duplicate]
...hasNext()) {
Map.Entry pair = (Map.Entry)it.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
it.remove(); // avoids a ConcurrentModificationException
}
}
Read more about Map.
...
What does .class mean in Java?
...s the class literal -
java.lang.Class object that represents information about given class.
For example, if your class is Print, then Print.class is an object that represents the class Print on runtime. It is the same object that is returned by the getClass() method of any (direct) instance of Pri...