LxLxBlog

Avoid NoSuchElementException in Java 8 streams

This problem is a follow-up to the earlier problem: adding up bigdecisions using streams The problem is related to add……

Java

2020-08-22

Java – spring: you cannot connect to JMX server from behind the firewall using RMI

My spring application runs on the machine behind the NAT firewall (pfsense) The internal IP of the machine is a.b.c.d ……

Java

2020-08-22

Java – if the return type of the rewriting method is original (such as double), can we change the return type of the rewriting method (such as int, char)?

As follows: Method to override: double add (int a,int b){ } Method of covering the above method: int add(int a,int ……

Java

2020-08-22

Lambda – the Java 8 stream is composed of three fields and aggregated by sum and count to produce single line output

I know that similar problems have been raised in the forum, but none of them seem to have completely solved my problem……

Java

2020-08-22

Close, destructor and finalize: Java conflict

See English answers > why does a try / catch block create new variable scope? 5 try { FileInputStream in = new Fil……

Java

2020-08-22

Java – if first is true, it is logical or the second statement is ignored

See English answers > java logical operator short circuiting 9 Solution No, No >Using the Boolean operator |, if……

Java

2020-08-22

Java – how to create / invoke SQL views in Hibernate

This is in document hbm. Views created in XML <database-object> <create><![CDATA[CREATE VIEW docVie……

Java

2020-08-22

Java – Google arcore domain model example

I am trying to read and understand the domain model of Google arcore, especially the Android SDK package At present, t……

Java

2020-08-22

java – Files. Blocked / synchronized version of copy

I'm trying to copy files from one directory to another, but I hope the call is blocked so that the program will execut……

Java

2020-08-22

java android new String

I have to convert a byte array to a string So I use this function: public static String byteToString(byte[] bytes) { ……

Java

2020-08-22

Java – how do I delete elements from a hash table using their values instead of keys?

I'm a novice in hash table. I just understand its basic operation Hashtable<Integer,String> ht = new Hashtable&l……

Java

2020-08-22

Java – creates a map from a list, where the key is part of the internal and external objects

Is it possible (in a simple way) to change it to java8 stream? (please don't comment / answer, if you want to tell me ……

Java

2020-08-22

Java – use jodatime to UTC to local time in milliseconds

I try to use jodatime to display transactions in a specific time period Our server requires the start date and end dat……

Java

2020-08-22

Java – an alternative to if else statements when using double precision

According to the salary, I need to assign a specific tax rate to the employee object Salary is defined by annual salar……

Java

2020-08-22

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

2020-08-22

Java – mulestudio Studio: Studio target failed to execute

I copied / pasted a work project in the mule studio workspace (from mule studio) to create a new project After that, I……

Java

2020-08-22

Java – create multiple jlabels and jtextfields in a less redundant way?

Anyone familiar with the Java GUI – swing package... And knows how to create multiple swing objects in a loop, such as……

Java

2020-08-22

Java 8: default method for automatically synthesizing multiple interfaces

I have classes that implement multiple interfaces with the same default methods I want to know how to synthesize defau……

Java

2020-08-22

Java – JUnit: call @ after to set the object to null

Suppose I have the following simple JUnit test private Person person; @Before public void createObject() { String ……

Java

2020-08-22

Java – why is there no exception in this byte?

I initialized a byte as follows: byte b = (byte) 0b11110000000; Since a byte is 8 bits in size, I expect it to throw s……

Java

2020-08-22

Java – missing annotation handling menu in eclipse

I use this manual https://github.com/excilys/androidannotations/wiki/Eclipse-Only-Configuration "5 Go to Java Compiler……

Java

2020-08-22

Java – horizontal recycler view with left and right arrow indicators

I'm trying to use the left and right arrow indicators to achieve a horizontal loop view So what happens is that if you……

Java

2020-08-22

Java – converts a list of objects with a map into a primitive array

I've been looking for something I need to do, but it's hard for me to put them together First of all, this is my goal.……

Java

2020-08-22

Java – save the data in the clip in the screen rotation in Android

Can anyone help me solve my problem? I have one activity and six clips A clip contains a link to my mediaplayer class,……

Java

2020-08-22

Java – syntax for moving backward in LinkedList?

I know that linkedlists are implemented in a two-way link, so each node has a next and a previous pointer However, I c……

Java

2020-08-22

Java – Android: cannot call private Android without args net. Uri()

I use gson to save the ArrayList of the custom model to the shared preferences Storage Code: ArrayList<DownloadProg……

Java

2020-08-22

In Java: what happens if I change a key in a HashMap to equal another key?

See English answers > changing an object which is used as a map key But what if I change the existing key to be equ……

Java

2020-08-22

Merge the two lists into a “two-dimensional” list in Java

See English answers > clearest way to combine two lists into a map (Java)? 15 @ h_ 502_ 7@ I have two lists: Names=……

Java

2020-08-22

Java – JPA entities with collections return false to the contains method on detached members

I have two JPA entity classes, group and user Group. java： @Entity @Table(name = "groups") public class Group { ……

Java

2020-08-22

How to retrieve parent objects by filtering from child objects in a Java stream

People are my root poja, and I have a list of phone numbers for my children String firstName; String lastName; Long ……

Java

2020-08-22

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

2020-08-22

Java 8: merge 2 string lists into the map

See English answers > clearest way to combine two lists into a map (Java)? 15 List<String> keys List<Strin……

Java

2020-08-22

搜索内容

Avoid NoSuchElementException in Java 8 streams

Java – spring: you cannot connect to JMX server from behind the firewall using RMI

Java – if the return type of the rewriting method is original (such as double), can we change the return type of the rewriting method (such as int, char)?

Lambda – the Java 8 stream is composed of three fields and aggregated by sum and count to produce single line output

Close, destructor and finalize: Java conflict

Java – if first is true, it is logical or the second statement is ignored

Java – how to create / invoke SQL views in Hibernate

Java – Google arcore domain model example

java – Files. Blocked / synchronized version of copy

java android new String

Java – how do I delete elements from a hash table using their values instead of keys?

Java – creates a map from a list, where the key is part of the internal and external objects

Java – use jodatime to UTC to local time in milliseconds

Java – an alternative to if else statements when using double precision

Java – how to create different classes for database connections

Java – mulestudio Studio: Studio target failed to execute

Java – create multiple jlabels and jtextfields in a less redundant way?

Java 8: default method for automatically synthesizing multiple interfaces

Java – JUnit: call @ after to set the object to null

Java – why is there no exception in this byte?

Java – missing annotation handling menu in eclipse

Java – horizontal recycler view with left and right arrow indicators

Java – converts a list of objects with a map into a primitive array

Java – save the data in the clip in the screen rotation in Android

Java – syntax for moving backward in LinkedList?

Java – Android: cannot call private Android without args net. Uri()

In Java: what happens if I change a key in a HashMap to equal another key?

Merge the two lists into a “two-dimensional” list in Java

Java – JPA entities with collections return false to the contains method on detached members

How to retrieve parent objects by filtering from child objects in a Java stream

Java – the special behavior of ArrayList remove () – why?

Java 8: merge 2 string lists into the map

Categories

Recent Posts

Tags