java

[Solved] How can I make a searchable PDF from an PDF of scanned pages? [closed]

by

String image2Text(String imagePath) { dataPath= Environment.getExternalStorageDirectory().toString() + “/Android/data/” + appContext.getPackageName() + “https://stackoverflow.com/”; File tessdata = new File(dataPath); if (!tessdata.exists() || !tessdata.isDirectory()) { throw new IllegalArgumentException(“Data path must contain subfolder tessdata!”); } Bitmap image= BitmapFactory.decodeFile(imagePath); TessBaseAPI baseApi = new TessBaseAPI(); baseApi.init(dataPath, “eng”); baseApi.setImage(image); String recognizedText = baseApi.getUTF8Text(); baseApi.end(); return recognizedText; } 8 solved How can I … Read more

(Solved) Merge Arraylists inside an ArrayLists of Arraylists [closed]

by

The following method should do the trick: public static <T> void merge(ArrayList<ArrayList<T>> arrayLists) { int blockSize = 6; for(int i=blockSize; i<arrayLists.size(); i++) { arrayLists.get(i % blockSize).addAll(arrayLists.get(i)); } arrayLists.subList(blockSize, arrayLists.size()).clear(); } You can convert blockSize to the method parameter if you like. 1 solved Merge Arraylists inside an ArrayLists of Arraylists [closed]

(Solved) Is Java “pass-by-reference” or “pass-by-value”?

by

Introduction Java is a popular programming language used by developers around the world. One of the most common questions asked about Java is whether it is a “pass-by-reference” or “pass-by-value” language. This article will explain the difference between the two and provide an answer to the question. It will also discuss the implications of the … Read more

(Solved) How do I compare strings in Java?

by

== tests for reference equality (whether they are the same object). .equals() tests for value equality (whether they are logically “equal”). Objects.equals() checks for null before calling .equals() so you don’t have to (available as of JDK7, also available in Guava). Consequently, if you want to test whether two strings have the same value you … Read more

(Solved) What is a NullPointerException, and how do I fix it?

by

There are two overarching types of variables in Java: Primitives: variables that contain data. If you want to manipulate the data in a primitive variable you can manipulate that variable directly. By convention primitive types start with a lowercase letter. For example variables of type int or char are primitives. References: variables that contain the … Read more

(Solved) Why is processing a sorted array faster than processing an unsorted array?

by

You are a victim of branch prediction fail. What is Branch Prediction? Consider a railroad junction: Image by Mecanismo, via Wikimedia Commons. Used under the CC-By-SA 3.0 license. Now for the sake of argument, suppose this is back in the 1800s – before long-distance or radio communication. You are the operator of a junction and … Read more

[Solved] DateTimeFormatter fails to parse a date in JDK 17 where as passes in JDK8 [closed]

by

tl;dr OffsetDateTime .parse( “Wed, 20 Feb 2019 07:14:06 +0100” , DateTimeFormatter.RFC_1123_DATE_TIME ) .toString() 2019-02-20T07:14:06+01:00 Details Your problem has nothing to do with Java 8 versus Java 17. Tip: Before blaming software that is formally specified, is thoroughly tested by enormous test suites, and is used by millions of programmers daily, suspect your own code first. … Read more

[Solved] CSV file generation in every 2 hours using Java

by

I am not using ScheduledExecutorService. I want simple way to solve this problem. You already have your answer: The Executors framework was added to Java to be that simple way to solve this problem. Executors abstract away the tricky messy details of handling background tasks and threading. Your should be using a ScheduledExecutorService for your … Read more

[Solved] Java Date and utcTimeOffset [closed]

by

java.time, the modern Java date and time API ZoneId danishTime = ZoneId.of(“Europe/Copenhagen”); DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(“uuuuMMddHHmmss”); DateTimeFormatter offsetFormatter = DateTimeFormatter.ofPattern(“XX”); String dateTimeString = “20180730131847”; String offsetString = “+0200”; ZoneOffset offset = ZoneOffset.from(offsetFormatter.parse(offsetString)); ZonedDateTime dateTime = LocalDateTime.parse(dateTimeString, dateTimeFormatter) .atOffset(offset) .atZoneSameInstant(danishTime); System.out.println(“Danish time: ” + dateTime); Output from this code is: Danish time: 2018-07-30T13:18:47+02:00[Europe/Copenhagen] The time zone … Read more

[Solved] What is the pattern of this type of Date?

by

Use Joda-Time, It’s a popular library and works like charm. Steps to follow: Add Jodatime to your project. Here Download Joda-time 2.Add below code. String date = “2016-09-07T02:03:30.000+03:00”; DateTime dt = new DateTime( date) ; System.out.print(dt.toDate()); My Output: Wed Sep 07 04:33:30 IST 2016 4 solved What is the pattern of this type of Date?