The main method must be declared public, static, and void; from JLS 12.1.4: The method main must be declared public, static, and void. It must specify a formal parameter (§8.4.1) whose declared type is array of String. Therefore, either of the following declarations is acceptable: public static void main(String[] args) public static void main(String… args) … Read more
What I think you’re trying to achieve is that when you call your method “horn” with some parameter it has to either use “Beep!” or “Boop!”. First of: void horn(a,b) Is not a valid function signature in Java, in a java function you always have to specify what type the input you’re providing is. In … Read more
First of all, what you are doing is fragile: If the InputStream was not a FileInputStream it would fail. If a future Java releases changes the internals of FileInputStream, it may fail. It is likely to fail if your code is sandboxed. It would be much better to keep / pass the value of the … Read more
I think you are missing the basic point here 🙁 When you want to update an already-existing layout, you shouldn’t inflate a new one. Instead, you fetch the views you want to update and put the data in them. Like this: TextView t = myLayout.findViewById(R.id.someTextViewId); t.setText(newlyObtainedData); As for the Context, every activity inherits after it, … Read more
Describe the algorithm to swap two adjacent elements by adjusting only the links (and not the data) using: a, singling link list b, doubling link list solved Describe the algorithm to swap two adjacent elements by adjusting only the links (and not the data) using: a, singling link list b, doubling link list
You can read the documentation about the JSONObject class in Android. In this documentation, you will find the method keys that will “Returns an iterator of the String names in this object.” So you just have to call this method and use the iterator. Iterator<String> keysIterator = jsonObject.keys(); String key; while (keysIterator.hasNext()) { key = … Read more
By default I believe android preferes the WiFi connection, but how is that relevant to this forum? 0 solved What connection does Android use when both WiFi and mobile data are simultaneously enabled?
I found the way to fix it! There is method in the JFrame componet that allows you to “erase” a JFrame: dispose() which does the following according to the Java API: Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned children. That is, the resources for … Read more
String valueData = “{\”x\”:10,\”y\”:10,\”z\”:10}.”; valueData = valueData.replace(“.”, “”); valueData = valueData.replace(“{“, “”); valueData = valueData.replace(“}”, “”); valueData = valueData.replace(“\””, “”); System.out.println(valueData); 4 solved How to split and replace comma and parenthesis?
JColorChooser has a getColor method which returns a Color which has methods getRed, getGreen and getBlue respectively solved How to get a RGB value from Color variable
Difference between these primarily is that boolean[] cameraPermissionGranted = {false}; is an array that persists boolean type of data initialized with single element false at present unless resized(re-initialized) while boolean cameraPermissionGranted = false; is just an attribute that is initialized as false and can be updated thereafter. One of the very intuitive example that comes … Read more
Java is not able to read/write to an arbitrary position in the RAM. If you want to share data between different applications, I recommend using a file or a database. solved Write data directly to RAM in Java, and then read it? [closed]
It is building a number which contains the 6th, 7th, 14th, 15th, 22nd and 23rd bits from the original image’s colour. i.e. it is producing a crude 6-bit colour from a 24-bit colour. e.g. 000000000rrrrrrrrrggggggggbbbbbbbb becomes the top bits of rrbbgg solved java-image processing [closed]
why we pass string array in main method? WHY its not possible to pass any other argument then String cant we pass arraylist of string? [closed] solved why we pass string array in main method? WHY its not possible to pass any other argument then String cant we pass arraylist of string? [closed]
Check out Math.random(), which gives you a random number [0,1). You want false 3/100 times, so if you multiply your random number by 100, your range will become [0, 100). Then just check if the random number is less than 3, if so, return false. 5 solved I want to return a value of true … Read more