Hello.java

class Hello {
  public static String helloString = "Hello World!";

  public static void main(String[] args) {
    System.out.println(helloString);
    foo();
  }

  public static void foo() {
    System.out.println("Foo called");
  }
}

shell

$ javac Hello.java
$ javap -c Hello
Compiled from "Hello.java"
class Hello {
  public static java.lang.String helloString;

  Hello();
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return

  public static void main(java.lang.String[]);
    Code:
       0: getstatic     #2                  // Field java/lang/System.out:Ljava/io/PrintStream;
       3: getstatic     #3                  // Field helloString:Ljava/lang/String;
       6: invokevirtual #4                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       9: invokestatic  #5                  // Method foo:()V
      12: return

  public static void foo();
    Code:
       0: getstatic     #2                  // Field java/lang/System.out:Ljava/io/PrintStream;
       3: ldc           #6                  // String Foo called
       5: invokevirtual #4                  // Method java/io/PrintStream.println:(Ljava/lang/String;)V
       8: return

  static {};
    Code:
       0: ldc           #7                  // String Hello World!
       2: putstatic     #3                  // Field helloString:Ljava/lang/String;
       5: return
}