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Should private helper methods be static if they can be static
...Something(0);
t.doSomething(0);
}
}
Bytecode (retrieved with javap -c -private TestBytecodeSize):
Compiled from "TestBytecodeSize.java"
class TestBytecodeSize extends java.lang.Object{
TestBytecodeSize();
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object."&...
Most efficient way to make the first character of a String lower case?
...a nice alternative if you don't want to use a third-party library:
import java.beans.Introspector;
Assert.assertEquals("someInputString", Introspector.decapitalize("SomeInputString"));
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how to read System environment variable in Spring applicationContext
...ath:config_#{systemProperties['env']}/db.properties" />
Combined with java ... -Denv=QA should solve your problem.
Note also a comment by @yiling:
In order to access system environment variable, that is OS level
variables as amoe commented, we can simply use "systemEnvironment"
instead...
Can I use assert on Android devices?
...0032c: 6e10 0c00 0000 |0002: invoke-virtual {v0}, Ljava/lang/Class;.desiredAssertionStatus:()Z // method@000c
000332: 0a00 |0005: move-result v0
000334: 3900 0600 |0006: if-nez v0, 000c // +0006
000338: 1210 ...
Java Generics: Cannot cast List to List? [duplicate]
...hether it's safe or not.
Have a look at this section of Angelika Langer's Java Generics FAQ for more information.
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How to set a timer in android
...ask (a function that I create which does not change the UI)?
Use this the Java way:
http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Timer.html
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How to replace a set of tokens in a Java String?
...table method String.format mentioned above is only available starting with Java 1.5 (which should be pretty standard nowadays, but you never know). Instead of that you might also use Java's class MessageFormat for replacing the placeholders.
It supports placeholders in the form '{number}', so your ...
Java Date vs Calendar
... FYI, the terribly troublesome old date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
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How do I convert a String to an int in Java?
How can I convert a String to an int in Java?
46 Answers
46
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Encode String to UTF-8
...
String objects in Java use the UTF-16 encoding that can't be modified.
The only thing that can have a different encoding is a byte[]. So if you need UTF-8 data, then you need a byte[]. If you have a String that contains unexpected data, then ...