包含标签：Java 的文章
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Java – why do I use random run to get the same number?
I'm following a book and in this Code: Random rand = new Random(47); int i,j,k; j = rand.nextInt(100) + 1; …… -
Java – build error: Jack needs build tool 24.0 0 or later
I use the RX Library in my android project, and for some reason, I need to build Gradle as: apply plugin: 'com.android…… -
Java – dagger 2: error getting multiple instances of the same object using @ named
How can I get multiple instances of the same return type like a cursor For example:- Module @CursorScope public class …… -
Java – Android NFC device owner configuration: send custom attributes Is it possible?
I am developing an application and have the following problems When using NFC for device owner configuration, I want t…… -
Java – textview confirmation location
I'm trying to make an Android code that provides different work for each button So when the user presses button 1, the…… -
java – CompletableFuture vs Spring Transactions
idea I have a handler that receives a list of items and processes them asynchronously using an external web service Th…… -
Java transform format String
I'm still a novice in Java. I wonder if there is any way to format double without rounding? double n = 0.12876543; Str…… -
Java – how to find minimum and maximum values by integer sequence?
I'm new to coding. I try to use math Min and math The max method finds the minimum and maximum values of an integer se…… -
Java – race conditions occur even after synchronization
I'm trying to run multiple threads I have obviously obtained the competitive conditions and can solve it as follows: f…… -
Parallelism in rxjava – filters
I have some very simple code and read a bunch of strings & application filters I want the filter to run on multipl…… -
Java – regular expressions that begin with an underscore but do not contain any underscores
I try to get the name of the file from the last underscore until the end For example, ABC_ AA. XML should be ABC and A…… -
Java – Maven: exclude the “meta-inf / Maven” folder from the jar
I use Maven to build jars When I checked the jar, I saw a maven folder in the meta - inf folder I want it to be exclud…… -
How to wrap Java util. Iterator to change the type of the object being iterated
I'm providing some appearance classes for third-party APIs. I need to wrap an iterator so that I can replace things it…… -
Java – method of overriding with different parameters
Suppose I have a parent class: class Parent{ public void aMethod() { //Some stuff } } It is a children…… -
Java – does the HTTP protocol version “http / 1.1” contain HTTPS?
I don't actually see this problem, perhaps because it is so basic I am using java Apache httpcomponent and check the r…… -
Understanding Java executorservice
I'm trying to learn how to use Java's executorservice, I am reading the following discussion java thread simple queue …… -
Haskell pattern matching vector
I'm following an online tutorial on Haskell We define a function to add a two-dimensional vector, represented by tuple…… -
Java – getters for display
I'm studying getters / incubators. The general idea is that they are evil and should be avoided You should let the obj…… -
RX Java – how to explicitly unsubscribe observable after oncomplete
In the following code, how and where does unsubscribe explicitly unsubscribe observable after completing oncomplete? g…… -
Java does not recognize elements in ArrayList?
I have a program where I make an ArrayList to save some cab objects I always get an error. What I get from the message…… -
Java – cannot save integers in an object array
I want to parse the string in object [] into integer and save it in the same place, as shown below: public class ArrPa…… -
Java – the special behavior of ArrayList remove () – why?
When we delete - 1 and empty the ArrayList, it will throw concurrentmodificationexception. When we delete 0 from the s…… -
Java – how to create different classes for database connections
I am developing a spring startup application. I need a general class to provide me with database connections for all c…… -
Java – cut and stack arrays
I have an int array as input The length of the array is always 2 ^ n. I want to cut the array in half and stack it Rep…… -
How does the Java – XOR (^) exchange algorithm work?
This is a way to swap a and B without requiring a third variable I understand whether XOR means "true" or "false" in t…… -
How to prevent Java from separating JSON strings passed as command-line parameters into single subunits of args []
I want to pass this JSON string to the Java class through command - line arguments However, in each space, the string …… -
Why if comparison doesn’t work in Java
I create a hash table in Java This is part of my code while (table[pos]!=null) { if (table[pos]==key) { …… -
Java – is it better to use inline local variables or chain methods?
If I have a series of method calls, each value for the next call, I should store them in local variables, as follows: …… -
How to create a general placeholder function in Java and use the function as a parameter later?
I don't know how to express my question, but it's simple I want to create a generic placeholder function that takes a …… -
Java – @ before / @ beforeclass doesn’t seem to work, and the object represents null
I was learning JUnit and had a problem at the beginning At the beginning, I want to initialize the object that will be…… -
java. Lang.unsupported operationexception: cannot resolve property at index 13: typedvalue {t = 0x2 / D = 0x7f010046 a = – 1}
I work for Android attrs XML file adds an attribute for different color shades In styles In the XML file, I give these…… -
I should put Java stream Is the map function used with the switch statement?
I want to stream objects to different objects according to type Stream<Animal> animals = Arrays.stream(Arrays.as……