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Java packages com and org
What are the meaning of the packages org and com in Java?
4 Answers
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What is the concept of erasure in generics in Java?
What is the concept of erasure in generics in Java?
8 Answers
8
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Java: Get last element after split
...ble ways together!!
By using lastIndexOf() & substring() methods of Java.lang.String
// int firstIndex = str.indexOf( separator );
int lastIndexOf = str.lastIndexOf( separator );
String begningPortion = str.substring( 0, lastIndexOf );
String endPortion = str.substring( lastIndexOf + 1 );
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Access string.xml Resource File from Java Android Code
...339): FATAL EXCEPTION: main 08-27 20:16:04.844: ERROR/AndroidRuntime(339): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.string/com.string.string}: android.content.res.Resources$NotFoundException: String resource ID #0x7f050000
– Ravikiran
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Regex expressions in Java, \\s vs. \\s+
...nts the regex match from failing. from http://www.coderanch.com/t/570917/java/java/regex-difference
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Debug a java application without starting the JVM with debug arguments
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On Java 11 jsadebugd was replaced by jhsdb debugd. So that becomes jhsdb debugd --pid <pid>. See slides of a talk presenting jhsdb and the docs for jhsdb
– Delthas
May 1 at 4:07
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How can I get current date in Android?
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FYI, the terribly troublesome date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
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How to split a string, but also keep the delimiters?
...s is to create a variable whose name represent what the regex does and use Java String format to help that. Like this:
static public final String WITH_DELIMITER = "((?<=%1$s)|(?=%1$s))";
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public void someMethod() {
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final String[] aEach = "a;b;c;d".split(String.format(WITH_DELIMITER, ";"))...
Java “params” in method signature?
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In Java it's called varargs, and the syntax looks like a regular parameter, but with an ellipsis ("...") after the type:
public void foo(Object... bar) {
for (Object baz : bar) {
System.out.println(baz.toString());
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What is a classpath and how do I set it?
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When programming in Java, you make other classes available to the class you are writing by putting something like this at the top of your source file:
import org.javaguy.coolframework.MyClass;
Or sometimes you 'bulk import' stuff by saying:
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