cat Main java public class Main public static void main final String a

$ cat Main.java
public class Main {
    public static void main(final String[] args) {
        switch (args.length) {
            case 0: break;
            case 1: System.out.println("hello, world"); break;
            case 2: break;
            case 3: break;
        }
    }
}
$ javac Main.java
$ javap -c Main.class
Compiled from "Main.java"
public class Main {
  public Main();
    Code:
       0: aload_0       
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return        

  public static void main(java.lang.String[]);
    Code:
       0: aload_0       
       1: arraylength   
       2: tableswitch   { // 0 to 3
                     0: 32
                     1: 35
                     2: 46
                     3: 49
               default: 49
          }
      32: goto          49
      35: getstatic     #2                  // Field java/lang/System.out:Ljava/io/PrintStream;
      38: ldc           #3                  // String hello, world
      40: invokevirtual #4                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
      43: goto          49
      46: goto          49
      49: return        
}