Skip to content

How to properly format the date?

The function shown below returns the date, e.g. “Sat Sep 8 00:00 PDT 2010”. But I expected to get the date in the following format “yyyy-MM-dd HH:mm”. What’s wrong in this code? String date = “2010-…

Sort an array in Java

I’m trying to make a program that consists of an array of 10 integers which all has a random value, so far so good. However, now I need to sort them in order from lowest to highest value and then print it onto the screen, how would I go about doing so? (Sorry for having so much code for a

Convert a 2D array into a 1D array

Here is the code I have so far: I seem to be stuck at this point on how to get [i][s] into a single dimensional array. When I do a print(temp) all the elements of my 2D array print out one a time in order but cannot figure out how to get them into the 1D array. I am a

Watermarking with PDFBox

I am trying to add a watermark to a PDF specifically with PDFBox. I’ve been able to get the image to appear on each page, but it loses the background transparency because it appears as though PDJpeg converts it to a JPG. Perhaps there’s a way to do it using PDXObjectImage. Here is what I have writ…

Regex doesn’t work in String.matches()

I have this small piece of code Supposed to print but it prints nothing!! Answer Welcome to Java’s misnamed .matches() method… It tries and matches ALL the input. Unfortunately, other languages have followed suit 🙁 If you want to see if the regex matches an input text, use a Pattern, a Matcher and…

How to print all key and values from HashMap in Android?

I am trying to use HashMap in Android sample project. Now, am doing sample project for learn android. I just store keys and values in HashMap, i want to show the keys and their values in EditView. I followed below code in my sample project. But, first key and value only printing in EditView. In EditView iOS =…