Java 25

Compact source file can be replaced with a regular class  

Reports compact source files and suggests replacing them with regular classes.

Explicit class declaration can be converted into a compact source file  

Reports ordinary classes, which can be converted into compact source files Example: public class Sample { public static void main(String[] args) { System.out.println("Hello, world!"); } } After the quick-fix is applied: void main() { IO.println("Hello, world!"); }.

Method from 'java.lang.IO' class can be used  

Reports System.out.println() and System.out.print() calls and suggests replacing them with methods from java.lang.IO class.

Method from 'System.out' can be used instead of 'java.lang.IO'  

Reports IO.println() and IO.print() calls and suggests replacing them with System.out methods.