classification
boutiqueUnder what circumstances cannot Java generics be used
1. Introduction Java 1.5 introduces generics to ensure type safety, prevent type conversion exceptions at run time, and allow classes to...
Free 
boutiqueJava random number traps
preface
We should be familiar with random numbers. We use them to generate Captcha in business, or we have low requirements for repeatability...
Free 
boutiqueFull analysis of Collectors in java8
1. The preface mentioned Collectors in an article about Collection removal elements yesterday. Believe a lot...
Free 
boutiqueMerge operations for Java Stream streams
1. Introduction Java Stream Api provides many useful Apis that make it convenient for us to combine collections or multiple similar types...
Free 
boutiqueWhen calculating in Java development, please be sure to use BigDecimal to calculate. BigDecimal summarizes and summarizes
Preface Today, a junior developer in the group asked why the tester tested that the price calculation module he wrote had calculation deviations...
Free 
boutiqueGet file path in java
1. Introduction In Java development, we often need to obtain the path of a file, such as reading configuration files, etc. Today we will...
Free 
boutiqueJava 9 to Java 17
Java 17 is one of the most important LTS releases of Java, but the direct transition from Java 8 to Java 17 is too long.
Free 
boutiqueJava Collection Collation Interface Comparator
1. The preface recently used set sorting (based on Java 8). Now I use Stream whenever I can,...
Free 
boutiqueResponsibility Chain Model of Design Model
preface
Many frameworks such as mybatis plug-ins, servlets filter, dubbo, security frameworks such as Spring sec...
Free 
boutiqueJava rapid development QR code generation service
1. Preface I don't know when it started, but our lives were suddenly filled with QR codes, even the chickens of the ladies on the street...
Free
boutiqueFrom Java 9 to Java 17 to Java 10
In the previous article, we reviewed some features of Java 9, and today we will take a look at what features Java 10 brings...
Free
boutiqueComparator and Comparable in Java
1. The previous article in the preface briefly explained java.util.Comparator. Today we will take a look at another one and...
Free 
boutiqueHow to determine whether a string is a number in java
preface
Numbers are often represented and conveyed in strings in some fields. So how do we determine a string...
Free 
boutiqueJava 14 New Features: JEP 359 Records(Preview)
1. Foreword Java 14 should be officially released this month (2020-03). There is a feature that the Java community has been calling for for a long time...
Free 
English 
Chinese