Java development trend and analysis report in 2022 From JRebel

The following is the Java development trend and analysis report in 2022 From JRebel recommended by recordtrend.com. And this article belongs to the classification: professional knowledge, research report.

Jrebel is a report summarized through a survey questionnaire, which covers different countries, different positions, different company sizes and different industries. Relatively speaking, the survey report is of certain reference significance.

1、 Java language and development trend

1. The proportion of java8 is still high

As can be seen from the report, java8 accounted for 37%, java11 accounted for 29%, and even 12% of the respondents used a version higher than java12.

Java8 was released in 2014. Compared with the previous version, java8 adds an excellent API such as lambda expression and stream streaming processing. It has been 8 years, and the Java version has been upgraded from 8 to 17. The version number has been increasing, but no particularly attractive language features have been added.

2. what factors are the driving force for upgrading?

The main upgrade factors include the LTS Version (25%), security (23%), performance (20%), while the proportion of new features (18%) and following the crowd (14%) is lower.

From this point, we can see why the proportion of versions after java11 is not high. With the release of java17, the proportion of java8 and java11 may decrease. In terms of security, unless it is a serious vulnerability, the java development team will generally upgrade it by means of patches, which will not affect the proportion of large version numbers.

In terms of performance, the Java team has been constantly optimizing. With the addition of G1, ZGC, Shenandoah and other excellent GCS, this has become an important reason for everyone to upgrade from java8.

In terms of functional features, java11 has added some grammars such as record type, sealed class, instanceof pattern matching, swtich expression and pattern matching. These new features can also increase the willingness to upgrade to java17.

3. the intention to upgrade java17 is strong

Java17 is the LTS Version (long-term support version) released in the second half of 2021.

It can be seen from the report that 37% of the people will be upgraded in the next 6 months, 25% will be upgraded in 6-12 months, and only 8% will not be upgraded.

It can be seen that 62% of the people will upgrade to java17 in the next year, and everyone is still willing to upgrade.

4. Java application architecture trend

Among various architectural styles, micro service architecture accounts for only 32%, single architecture 22%, modular single architecture 13%, and SOA architecture 12%.

From the results, the definition and classification of architecture style in the questionnaire are relatively detailed.

The architecture style is not evaluated here. The architecture is only suitable or not, and there is no difference between good and bad.

2、 Java technology trends

1. More than half of Java applications use container deployment

From the questionnaire results, we can see that docker utilization rate is 41%, kubernetes utilization rate is 26%, VMware utilization rate is 16%, and vagrant utilization rate is 3%, that is, 86% have realized virtualization, among which docker and kubernetes account for the highest proportion.

Therefore, in the Java upgraded version feature, the container aware capability is implemented to make it easier to container Java services.

2. nearly half of the servers use Tomcat containers

Springboot is the first choice among many micro service frameworks. The default application container of springboot is Tomcat. In addition to the open source mode of tomcat, it is expected that nearly half of the application servers will choose Tomcat.

3. Maven is the main build tool

Which one should Maven and gradle use? The issue seems to have been debated for a long time. From the results of the questionnaire, Maven’s share is 68% and gradle’s share is 23%. Maven still has an absolute advantage.

Gradle adopts the method that convention is greater than configuration, which is consistent with the concept of springboot. However, in terms of market acceptance and development, there is no trend to replace Maven. Android projects use gradle by default, which shows Google’s admiration for gradle and also confirms the excellence of gradle. However, gradle has no absolute advantage.

3、 Developer productivity trends

1. time to redeploy the application

In many cases, we may only change one line of code, and then verify whether the function is normal. At this time, we need to redeploy the application. Jrebel counts the time it takes to redeploy.

As a result, 50% of them need more than 3 minutes to redeploy, and 21% of them need more than 10 minutes.

2. what would you do if you saved time on redeployment?

28% will add new functions; 20% will optimize the system performance; 19% will improve the test coverage. These are all positive, and the ones with high probability are those who answer others: drink coffee, drink beer, lie down, sleep, fish

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