Java
-
Java – maximum flow using custom comparator
The following is my specially written code for using a custom comparator with Max in Java 8 stream import java.math.Bi…… -
Infinite loop in Java
I'm new to Java I tried to extract employee data from a text file and store it in a collection I use stringtokenizer t…… -
Arguments of type ‘volatile char *’ are incompatible with arguments of type ‘const char *’
I have a function whose prototype is as follows: void foo(const char * data); Elsewhere in my code, I have a global va…… -
Java – many Boolean flags are entered into the class
I have a dialog box that displays various contents according to the status of the application and the security of the …… -
Java mongodb 3.0 driver query without filter
How do I query using the Java mongodb 3.0 driver? I tried to query unique category records from the location collectio…… -
Java – update ArrayList with HashMap
I just started learning to use HashMap and read the java tutorial, but I was in trouble I'm trying to update the list …… -
Java – multiple values of columns in the database
Whether multiple values can be stored in database columns If so, which type should I use? And how to insert values thr…… -
Java – create treemap visualization
I want an algorithm for creating treemap visualization Like this: an easy way to make a treemap The problem is that I …… -
Java – is there a simple way to loop stdin in guava?
In Apache commons, I can write: LineIterator it = IoUtils.lineIterator(system.in,"utf-8"); while (it.hasNext()) { …… -
What Java library should I use for image clipping / letterboxing?
I am looking for a Java library for image clipping / resizing I planned to use jmagick, but I haven't maintained it si…… -
Assigning objects in Java
I have this Code: this.elements = elements; Where the element is list Copy list or just pointer copy, both represent t…… -
Java string to int
I have a string of about 150 numbers, such as string num = "64513246563....."; I'm trying to add every number of this …… -
Java – create treemap visualization
I want an algorithm for creating treemap visualization Like this: an easy way to make a treemap The problem is that I …… -
Java code optimization, it will optimize this
For newer compilers, I find myself trying to write more readable code, but if the optimization I want to do under the …… -
Get the certificate and add it to the Java trust store, only HTTPS URL?
I'm trying to send push notifications to Android devices through Google cloud messaging server The URL we use is: http…… -
Java string to int
I have a string of about 150 numbers, such as string num = "64513246563....."; I'm trying to add every number of this …… -
Java – how to create a very large BigInteger
I need to add two very large integers 46376937677490009712648124896970078050417018260538 + 371072875339021027987979982…… -
Java – why is the Boolean value from this array to 2D array true?
Hi, I happened to meet the code sent to me by my friend and had trouble writing the second part of the print statement…… -
Java – wrap another string around the string
Do I have any utils methods in Java that allow me to surround a string with another string? It's like: surround("hello…… -
Java – use bouncycastle to read the elliptic curve private key from the file
The bouncycastle encryption API allows the use of regular Java Security package objects create and validate digital si…… -
-
Java – create treemap visualization
I want an algorithm for creating treemap visualization Like this: an easy way to make a treemap The problem is that I …… -
String literals and string objects in Java
In Java, string can be created in the following two ways >String foo = "test"; > String fooobj = new String(“Tes…… -
Why does the java compiler not shorten the name by default? (performance and confusion)
I can't understand why the java compiler doesn't shorten the names of variables, parameters and method names by replac…… -
Java program organization: how to get rid of this large-scale case statement?
I'm creating a program that will fill in attributives Now I'm simulating "various words" like this: public class WordD…… -
RX Java – rxjava returns a single, which is completed after execution
I'm trying to do the following: return some data as a single, and then execute it after completion Due to single Andth…… -
Java coding practices, runtime exceptions, and this scenario
In the following scenario, I try to understand how to handle this code and its relationship with runtimexception As I'…… -
Java – if (pause = = null) {does not work
When pause is null, I use if (pause = = null) to perform some operations But I made a mistake For parameter type long,…… -
-
Java – Android: how do I get two digits after a decimal value? Do not want to truncate the value
How to get a double precision value with only two digits after the decimal point For example, if a = 190253 8084615384…… -
java – Arrays. asList(). Contains() gives the wrong result
code: private static final int[] GOOGLE_DIRECTION_ID_FOR_MATCH = { 11,12,13,14,15 }; Log.e(TAG,"index : " …… -
Java swing – JPanel and GridLayout margins / padding
I'm trying to build a chess game in Java. I'm having some trouble getting the GUI exactly the way I want using swing I……