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In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]
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Remember to add Javadoc about the behaviour when passing null objects.
– Thorbjørn Ravn Andersen
Feb 16 '10 at 18:25
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Best practice to validate null and empty collection in Java
...s about the same thing with C#, but the principles applies equally well to java. Like mentioned there, null should be returned only if
null might mean something more specific;
your API (contract) might force you to return null.
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Biggest GWT Pitfalls? [closed]
...de.google.com/p/google-web-toolkit/wiki/UsingOOPHM
Problem: GWT code is java, and has a different mentality to laying out a HTML page, which makes taking a HTML design and turning it into GWT harder
Solution: Again you get used to this, but unfortunately converting a HTML design to a GWT design ...
How to print out all the elements of a List in Java?
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Since Java 8, List inherits a default "forEach" method which you can combine with the method reference "System.out::println" like this:
list.forEach(System.out::println);
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Number of lines in a file in Java
... is.close();
}
}
EDIT, 9 1/2 years later: I have practically no java experience, but anyways I have tried to benchmark this code against the LineNumberReader solution below since it bothered me that nobody did it. It seems that especially for large files my solution is faster. Although it...
When do you use varargs in Java?
...vocation. You can write code to build an array and pass it, or you can let Java do it for you when you choose to receive it in a varargs parameter.
– H2ONaCl
Dec 24 '15 at 23:01
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Things possible in IntelliJ that aren't possible in Eclipse?
...ings you to where clicked object is defined works everywhere - not only in Java classes and variables in Java code, but in Spring configuration (you can click on class name, or property, or bean name), in Hibernate (you can click on property name or class, or included resource), you can navigate wit...
Android Camera : data intent returns null
...ackages_apps_camera/blob/gingerbread-release/src/com/android/camera/Camera.java#L1186
Bundle newExtras = new Bundle();
if (mCropValue.equals("circle")) {
newExtras.putString("circleCrop", "true");
}
if (mSaveUri != null) {
newExtras.putParcelable(MediaStore.EXTRA_OUTPUT, mSaveUri);
} else {...
Useful example of a shutdown hook in Java?
I'm trying to make sure my Java application takes reasonable steps to be robust, and part of that involves shutting down gracefully. I am reading about shutdown hooks and I don't actually get how to make use of them in practice.
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Removing whitespace from strings in Java
...string is not modified as some of the answers sort of imply.
(Experienced Java developers might say "of course, you can't actually modify a String", but the target audience for this question may well not know this.)
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