Compiled from "example.java"
class ZFirstClass {
  ZFirstClass();
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: return
    LineNumberTable:
      line 1: 0

  static int square(int);
    Code:
       0: iload_0
       1: iload_0
       2: imul
       3: ireturn
    LineNumberTable:
      line 3: 0
}