java

[Solved] Regular Expressions in Java replace odd # of slashes

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Pattern p = Pattern.compile(“(?<!/)/(//)*(?!/)”); Matcher m = p.matcher(inputString); String outputStr = m.replaceAll(“$0$0”); (?<!/) makes sure there are no slashes right before the match; /(//)* matches an odd number of slashes; (?!/) makes sure there are no slashes right after the match. The replacement string is $0$0, which doubles up the matched slashes. I’ve tested this … Read more

[Solved] Multipart entity file uploading java.lang.ArrayIndexOutOfBoundsException

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when you do entityBuilder.addPart( “userfile[” + i + “]”, new FileBody(mfile[i])); you have already exited the for loop and i has become equals in size to selectedImgLength, therefore you will get a ArrayIndexOutOfBoundsException try changing so that adding the file to the entityBuilder within the for loop. 1 solved Multipart entity file uploading java.lang.ArrayIndexOutOfBoundsException

[Solved] save a file in java

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Like the others say, plenty of things that might be problematic … However serialization is one way to store a object in a file and read it back to a object from a file. http://www.java-samples.com/showtutorial.php?tutorialid=398 solved save a file in java

[Solved] no such table: main.course_name

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Unfortunately i did not write any query to create the above table causing the error. Assuming that you really meant to say i did not write any query to use the above table; you did implicitly by defining teacher_table table with :- +”FOREIGN KEY(“+courseId+”)”+” REFERENCES “+CourseTable.courseName+”(“+CourseTable.courseID+”)” That is to insert into the teacher_table the value … Read more

[Solved] Compile single .java file with two classes into two .class files [closed]

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I am not sure what you are doing wrong so I will just show you how it can be done. Lets say you have directories and files [myProject] | +–[src] | | | +–[com] | | | +–[DatingService] | | | +– Main.java | +–[classes] and your Main.java file looks something like package com.DatingService; class … Read more

[Solved] How do I parse a JSON array in Java? [duplicate]

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The following is related to the JSON.simple library. You need a JSONParser instance to get a JSONObject value from your String object. JSONObject data; try { JSONParser helper = new JSONParser(); data = (JSONObject)helper.parse(String); } catch (ParseException parse) { // Invalid syntax return; } // Note that these may throw several exceptions JSONObject node = … Read more

[Solved] how can i get functionality like show/hide buttons in Android gallery on screen tap [closed]

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you can use ‘GestureDetector’ instead of ACTION_DOWN. Example, GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() { @Override public boolean onSingleTapUp(MotionEvent e) { //——————apply your logic here———— return super.onSingleTapUp(e); } @Override public boolean onSingleTapConfirmed(MotionEvent e) { return super.onSingleTapConfirmed(e); } }); and pass touch event to gesture. @Override public boolean onTouchEvent(MotionEvent event) { gestureDetector.onTouchEvent(event); return super.onTouchEvent(event); } … Read more

[Solved] How to subtract time with current time

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The time difference (in milliseconds) can be obtained using: ChronoUnit.MILLIS .between(Instant.parse(“2018-07-26T16:00:17.163Z”), Instant.now()) Instant.now() will be the current UTC time, and your input date is UTC time, which makes the diff sensible. Regardless of the current time zone, the difference will be consistent. You can change the time unit accordingly (such as ChronoUnit.HOURS). 0 solved How … Read more

[Solved] PHP and Java, how to join them?

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I have noticed some websites using like this, can not remind now, but I think you can do that through JavaScript . Passing the data to JavaScript and retributive it and again use and send result through JavaScript . PHP has support for instantiation of Java objects and using them transparently as PHP objects. and … Read more