Java 11 onwards, now a single java file can be tested easily without compiling as well. Consider the following example
Java11Tester.java
public class Java11Tester {
public static void main(String[] args) {
System.out.println("Hello World !!");
}
}
Old way of running file (Before Java 11)
C:\hitechpoints\workspace\java11-feature\src>javac Java11Tester.java
C:\hitechpoints\workspace\java11-feature\src>java Java11Tester
Hello World !!
New way of running file
C:\hitechpoints\workspace\java11-feature\src>java Java11Tester
Hello World !!