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In java how to get substring from a string till a character c?
...n just 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 be...
How to remove the last character from a string?
... is a safer convention to put the NULL on the left. This isn't an issue in Java though.
– Gyan aka Gary Buyn
Jul 26 '14 at 0:31
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Sending a notification from a service in Android
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This type of Notification is deprecated as seen from documents:
@java.lang.Deprecated
public Notification(int icon, java.lang.CharSequence tickerText, long when) { /* compiled code */ }
public Notification(android.os.Parcel parcel) { /* compiled code */ }
@java.lang.Deprecated
public voi...
A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplic
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Using Java 8 you can do this in a very clean way:
String.join(delimiter, elements);
This works in three ways:
1) directly specifying the elements
String joined1 = String.join(",", "a", "b", "c");
2) using arrays
String[] ar...
How should I escape strings in JSON?
...Utilities.escapeHtml , StringEscapeUtilities.escapeXml , or should I use java.net.URLEncoder ?
18 Answers
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What is the difference between == and equals() in Java?
...ich states that equal objects must have equal hash codes. (docs.oracle.com/javase/7/docs/api/java/lang/…)
– Abhijeet
Jul 6 '16 at 13:20
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How to generate a random alpha-numeric string?
I've been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated).
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What are the disadvantages to declaring Scala case classes?
... Person$.class and Person.class. If you disassemble Person$.class with the javap command, you’ll see that it contains an apply method, along with many others:
$ javap Person$
Compiled from "Person.scala"
public final class Person$ extends scala.runtime.AbstractFunction1 implements scala.ScalaObje...
java.nio.file.Path for a classpath resource
...sspath resource (e.g. what I'd get from Class.getResource(String) ) as a java.nio.file.Path ? Ideally, I'd like to use the fancy new Path APIs with classpath resources.
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How to check if a String is numeric in Java
...tils.isParsable which basically checks the number is parsable according to Java. (The linked javadocs contain detailed examples for each method.)
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