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java.lang.NoClassDefFoundError: Could not initialize class XXX
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You are getting a java.lang.NoClassDefFoundError which does NOT mean that your class is missing (in that case you'd get a java.lang.ClassNotFoundException). The ClassLoader ran into an error while reading the class definition when trying to read th...
Why doesn't java.lang.Number implement Comparable? [duplicate]
Does anyone know why java.lang.Number does not implement Comparable ? This means that you cannot sort Number s with Collections.sort which seems to me a little strange.
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How to store printStackTrace into a string [duplicate]
...getStackTrace(Throwable t); from Apache Commons 3 class org.apache.commons.lang3.exception.ExceptionUtils.
http://commons.apache.org/proper/commons-lang/
ExceptionUtils.getStackTrace(Throwable t)
Code example:
try {
// your code here
} catch(Exception e) {
String s = ExceptionUtils.getSt...
Change app language programmatically in Android
Is it possible to change the language of an app programmatically while still using Android resources?
35 Answers
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How to format a Java string with leading zero?
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StringUtils.leftPad(yourString, 8, '0');
This is from commons-lang. See javadoc
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Is there anything like .NET's NotImplementedException in Java?
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Commons Lang has it. Or you could throw an UnsupportedOperationException.
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What does .class mean in Java?
...ou write .class after a class name, it references 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 g...
Which is more efficient, a for-each loop, or an iterator?
...ORE 3
GOTO L2
L3
ALOAD 3
INVOKEINTERFACE java/util/Iterator.next()Ljava/lang/Object;
CHECKCAST java/lang/Integer
ASTORE 2
ALOAD 2
INVOKEVIRTUAL java/lang/Integer.toString()Ljava/lang/String;
POP
L2
ALOAD 3
INVOKEINTERFACE java/util/Iterator.hasNext()Z
IFNE L3
And second, the iterator:
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How can I remove an element from a list?
...ist(name="Ken",age=24,
interest=c("reading","music","movies"),
lang=list(r=2,csharp=4,python=3)),
p2=list(name="James",age=25,
interest=c("sports","music"),
lang=list(r=3,java=2,cpp=5)),
p3=list(name="Penny",age=24,
interest=c("movies","reading"),
lang=lis...
Can I multiply strings in Java to repeat sequences? [duplicate]
...!)
Now, if you want to do it the easy way in java, use the Apache commons-lang package. Assuming you're using maven, add this dependency to your pom.xml:
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<...