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In java how to get substring from a string till a character c?
...t split the string..
public String[] split(String regex)
Note that java.lang.String.split uses delimiter's regular expression value.
Basically like this...
String filename = "abc.def.ghi"; // full file name
String[] parts = filename.split("\\."); // String array, each element is text between...
“new” keyword in Scala
...0: LonelyGuy.type = LonelyGuy$@3449a8
scala> LonelyGuy.mood
res4: java.lang.String = sad
With a case classes (actually, underneath there are class + object = companion pattern, e.g. having class and object with the same name):
scala> case class Foo(bar: String)
defined class Foo
scala&g...
What is the use of printStackTrace() method in Java?
...
e.printStackTrace();
}
System.exit(0);
Calling println(e):
java.lang.NullPointerException
Calling e.printStackTrace():
java.io.IOException
at package.Test.main(Test.java:74)
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Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
..." daemon prio=2 tid=10df3f000 nid=0x12a421000 runnable [12a41f000]
java.lang.Thread.State: RUNNABLE
at java.util.Collections.unmodifiableList(Collections.java:1131)
at com.intellij.execution.configurations.ParametersList.getList(ParametersList.java:88)
at com.intellij.execution.config...
Is there a Java reflection utility to do a deep comparison of two objects?
...als that is (or ever could be) a true equality relation is the one in java.lang.Object. Even if you did use equals to compare everything in the graph, the risk of breaking the contract is quite high. As Josh Bloch pointed out in Effective Java, the contract of equals is very easy to break:
"There i...
How to subtract X day from a Date object in Java?
... java.util.Date.
Apache-commons
One possibility is to use apache-commons-lang. You can do it using DateUtils as follows:
Date dateBefore30Days = DateUtils.addDays(new Date(),-30);
Of course add the commons-lang dependency to do only date subtract it's probably not a good options, however if you...
Is it possible to read the value of a annotation in java?
... the link here so people can use it.
Example from this page:
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
@Retention(RetentionPolicy.RUNTIME)
@interface MyAnno {
String str();
int val();
}
class Meta {
@MyAnno(str = ...
How to analyze a java thread dump?
...at notification it's waiting on:
"- waiting on <0x27ef0288> (a java.lang.ref.ReferenceQueue$Lock)"
Definition of the ReferenceQueue is:
Reference queues, to which registered reference objects are appended by the garbage collector after the appropriate reachability changes are detected.
Th...
javax.faces.application.ViewExpiredException: View could not be restored
...ly redirect further to home or login page.
<!DOCTYPE html>
<html lang="en">
<head>
<title>Session expired</title>
<meta http-equiv="refresh" content="0;url=#{request.contextPath}/login.xhtml" />
</head>
<body>
<h...
How to make my font bold using css?
...11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="de">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Hi, I'm bold!</title>
</head>
<body>...