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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 to use UTF-8 in resource properties with ResourceBundle
I need to use UTF-8 in my resource properties using Java's ResourceBundle . When I enter the text directly into the properties file, it displays as mojibake.
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How to randomly pick an element from an array
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yes, but you've to tell that generator is an instance of java.util.Random
– stivlo
Nov 9 '11 at 13:17
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Eclipse: Java, see where class is used
Is there a way in Eclipse to select a Java class, and then bring up a list of all Java files where that class is used within a project?
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Java: parse int value from a char
... principle better. Also, 'x' means get the ascii value of the character in Java.
– Kevin Van Ryckegem
May 13 '17 at 13:16
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What does (angle brackets) mean in Java?
I am currently studying Java and have recently been stumped by angle brackets(). What exactly do they mean?
6 Answers
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Warning - Build path specifies execution environment J2SE-1.4
... Eclipse from your project:
Right-click on your project
Click Properties
Java build path: Libraries; Remove the "JRE System Library[J2SE 1.4]"
Click Add Library -> JRE System Library
Select the new "Execution Environment" or Workspace default JRE
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Sort an array in Java
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I was lazy and added the loops
import java.util.Arrays;
public class Sort {
public static void main(String args[])
{
int [] array = new int[10];
for ( int i = 0 ; i < array.length ; i++ ) {
array[i] = ((int)(Math.random()*...
Convert JSON style properties names to Java CamelCase names with GSON
I'm using GSON to convert JSON data I get to a Java object. It works pretty well in all my tests.
The problem is that our real objects have some properties named like is_online. GSON only maps them if they are named totally equal, it would be nice to have GSON convert the names to Java camel case ...
Java 8 method references: provide a Supplier capable of supplying a parameterized result
...ise you will get an error message like MyException cannot be converted to java.lang.RuntimeException
Update:- This was an issue with an older version of JDK. I don't see this issue with the latest versions.
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