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How can I truncate a double to only two decimal places in Java?
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If you want that for display purposes, use java.text.DecimalFormat:
new DecimalFormat("#.##").format(dblVar);
If you need it for calculations, use java.lang.Math:
Math.floor(value * 100) / 100;
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Why are arrays covariant but generics are invariant?
From Effective Java by Joshua Bloch,
9 Answers
9
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What is the 'instanceof' operator used for in Java?
...an object.
It returns a boolean value.
For example
package test;
import java.util.Date;
import java.util.Map;
import java.util.HashMap;
public class instanceoftest
{
public static void main(String args[])
{
Map m=new HashMap();
System.out.println("Returns a boolean value ...
About Java cloneable
I was looking for some tutorials explaining about Java Cloneable , but did not get any good links, and Stack Overflow is becoming more obvious choice anyways.
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How can I get the current stack trace in Java?
How do I get the current stack trace in Java, like how in .NET you can do Environment.StackTrace ?
21 Answers
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How to change the Eclipse default workspace?
... I do if want to change the root directory of eclipse (for file handing in java)?
– Dhruv Singhal
Aug 3 '18 at 13:59
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Java 8 Iterable.forEach() vs foreach loop
Which of the following is better practice in Java 8?
8 Answers
8
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Break or return from Java 8 stream forEach?
...dangerous as it could be misleading for a beginner. According to Effective Java 2nd Edition, Chapter 9, Item 57 : ' Use exceptions only for exceptional conditions'. Furthermore 'Use runtime exceptions to indicate programming errors'. In definitive, I strongly encourage anyone considering this soluti...
How do I use Node.js Crypto to create a HMAC-SHA1 hash?
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98
A few years ago it was said that update() and digest() were legacy methods and the new streamin...
Reading Properties file in Java
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my file hierarchy is: src -> myPackage -> myClass.java , myProp.properties. I did what you advised me but it still throws the same exception
– nikos
Nov 27 '11 at 13:03
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