10 IntelliJ IDEA Hacks to Supercharge Your Java Development

Introduction

Improving development efficiency is a concern for every programmer; this article shares ten concise tips for boosting productivity in IntelliJ IDEA, each accompanied by a visual demonstration.

1. Quickly generate a main method and print

Use the psvm command to generate a main method, and the sout command to create a System.out.println statement. Combining both commands produces the following result:

2. Quickly assign values to a newly created object

Appending .var after a new object enables rapid assignment, as shown below:

3. Fast for loops

Basic variables : Adding .for after a variable such as int, long, or byte instantly creates a for‑loop.

Collections : Adding .for after a collection generates a forEach loop.

4. Fast conditional statements

boolean.if

generates

if(boolean)

boolean.else

generates

if(!boolean)

string.null

generates

if(string==null)

string.nn

generates

if(string!=null)

Similarly, .switch provides comparable functionality.

5. Fast try...catch

Appending .try automatically creates a try‑catch block, saving time when handling exceptions.

6. Fast type casting

Adding .castvar generates the necessary parentheses and assignment for type conversion.

7. Fast variable extraction

Use .field to extract a local variable into a member or global variable instantly.

8. Fast Optional definition

Appending .opt converts an object to Optional, helping avoid null‑pointer issues.

9. Fast lambda generation

When using JDK 1.8 or later, adding .lambda quickly creates a lambda expression.

10. Fast code migration to a new method

During refactoring, pressing ctrl + alt + m moves selected code into a new method.

Conclusion

These ten IDEA shortcuts are just a glimpse of the many useful features available; feel free to explore and share additional tips with the community.