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Measure execution time for a Java method [duplicate]
How do I calculate the time taken for the execution of a method in Java?
8 Answers
8
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Why can't strings be mutable in Java and .NET?
Why is it that they decided to make String immutable in Java and .NET (and some other languages)? Why didn't they make it mutable?
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How to pretty print XML from Java?
I have a Java String that contains XML, with no line feeds or indentations. I would like to turn it into a String with nicely formatted XML. How do I do this?
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Short form for Java if statement
I know there is a way for writing a Java if statement in short form.
15 Answers
15
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Eclipse: Exclude specific packages when autocompleting a class name
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Window->Preferences->Java->Appearance->Type Filters
You should be able to specify there the packages you do not want to see.
See Java Tips and Tricks
To exclude certain types from appearing in content assist, use the type filter fe...
How to override toString() properly in Java?
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@Amit The Java compiler uses StringBuilder implicitly. There's no problem unless you're using it in a loop.
– chrylis -cautiouslyoptimistic-
Jul 6 '17 at 23:37
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Why doesn't String switch statement support a null case?
I am just wondering why the Java 7 switch statement does not support a null case and instead throws NullPointerException ? See the commented line below (example taken from the Java Tutorials article on switch ):
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How do you return a JSON object from a Java Servlet
How do you return a JSON object form a Java servlet.
13 Answers
13
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How do I convert a byte array to Base64 in Java?
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Java 8+
Encode or decode byte arrays:
byte[] encoded = Base64.getEncoder().encode("Hello".getBytes());
println(new String(encoded)); // Outputs "SGVsbG8="
byte[] decoded = Base64.getDecoder().decode(encoded);
println(new S...
How to insert a SQLite record with a datetime set to 'now' in Android application?
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You cannot use the datetime function using the Java wrapper "ContentValues". Either you can use :
SQLiteDatabase.execSQL so you can enter a raw SQL query.
mDb.execSQL("INSERT INTO "+DATABASE_TABLE+" VALUES (null, datetime()) ");
Or the java date time capabilities :
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