Method invocation

invokestatic

invoke a static method:

invokestatic
indexbyte1
indexbyte2

invoke a static method, the method is from the constant pool by

index= (indexbyte1 << 8) | indexbyte2

說明文字

public class Hello {
    public static void sayHello(String msg) {
        System.out.println(msg);
    }

    public static void main(String[] args) {
        sayHello("Riguz!");
    }
}

👉

// Riguz!
#4 = String             #23
// com/riguz/Hello.sayHello:(Ljava/lang/String;)V
#5 = Methodref          #6.#24 
...
  public static void main(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)V
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
         0: ldc           #4
         2: invokestatic  #5
         5: return
      LineNumberTable:
        line 9: 0
        line 10: 5
}

invokevirtual

invokespecial

invokeinterface

invokedynamic