The simplest Java program
class Test{
}
When java Test will report an error when the
java command is explained, there must be
public static void main(String[] args){
}
main method, and must be in this format
Java source file naming
must be .java suffix The
source file name can be arbitrary, but if the source file has a public class, the name must be the same as the class name.
This also limits a source file to only one public class
All keywords in
Java are lowercase, and Java is strictly case sensitive