Calling a static method is the one and only use case of invokestatic.

InvokeStatic.java

public class InvokeStatic {
  public static void someStaticMethod() {}
  public static void main(String[] args) {
    someStaticMethod();
  }
}

//Compiled from "InvokeStatic.java"
//public class InvokeStatic {
//  public InvokeStatic();
//    Code:
//       0: aload_0       
//       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
//       4: return        
//
//  public static void someStaticMethod();
//    Code:
//       0: return        
//
//  public static void main(java.lang.String[]);
//    Code:
//       0: invokestatic  #2                  // Method someStaticMethod:()V
//       3: return        
//}