java
ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
From the Java 11 BigDecimal docs: When a MathContext object is supplied with a precision setting of 0 (for example, MathContext.UNLIMITED), arithmetic operations are exact, as are the arithmetic methods which take no MathContext object. (This is the only behavior that was supported in releases prior to 5.) As a corollary of computing the exact result, the rounding mode setting of a MathContext object with … Read more
Difference between volatile and synchronized in Java
It’s important to understand that there are two aspects to thread safety. execution control, and memory visibility The first has to do with controlling when code executes (including the order in which instructions are executed) and whether it can execute concurrently, and the second to do with when the effects in memory of what has been done … Read more
ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
From the Java 11 BigDecimal docs: When a MathContext object is supplied with a precision setting of 0 (for example, MathContext.UNLIMITED), arithmetic operations are exact, as are the arithmetic methods which take no MathContext object. (This is the only behavior that was supported in releases prior to 5.) As a corollary of computing the exact result, the rounding mode setting of a MathContext object with … Read more
How to convert a date to milliseconds
You don’t have a Date, you have a String representation of a date. You should convert the String into a Date and then obtain the milliseconds. To convert a String into a Date and vice versa you should use SimpleDateFormat class. Here’s an example of what you want/need to do (assuming time zone is not involved here): Still, be careful because in Java the milliseconds obtained are the … Read more
Java Fraction Calculator
When you class mates tell you, that you didn’t call the reduce method, they mean, that you never use the reduce method. Your add-method should look somewhat like this: and the multiply method should look like this: Remember that you also have to change your reduce method, as it always returns 1 right now! Edit: Added code to print fraction … Read more
Exception in thread “main” java.net.BindException: Address already in use – Error in Netbeans only
The way to achieve what I want is to right-click on the particular class (ex. Server.java) that I want to run and select “Run this file”. This enables me to run only the Server app. Then, do the same process for the other file, Client.java. However, Netbeans is somewhat confusing/deceiving in this particular circumstance. What Netbeans does … Read more
Netbeans – Error: Could not find or load main class
Right click on your Project in the project explorer Click on properties Click on Run Make sure your Main Class is the one you want to be the entry point. (Make sure to use the fully qualified name i.e. mypackage.MyClass) Click OK. Clean an build your project Run Project 🙂 If you just want to … Read more
Is there a way to end the program if statement is false?
This should end it!