Javassist to ASM about hikaricp HOT 3 CLOSED

MethodNode mn = new MethodNode(...);
InsnList il = mn.instructions;
il.add(new VarInsnNode(ILOAD, 1));
LabelNode label = new LabelNode();
il.add(new JumpInsnNode(IFLT, label));
il.add(new VarInsnNode(ALOAD, 0));
il.add(new VarInsnNode(ILOAD, 1));
il.add(new FieldInsnNode(PUTFIELD, "pkg/Bean", "f", "I"));
LabelNode end = new LabelNode();
il.add(new JumpInsnNode(GOTO, end));
il.add(label);
il.add(new FrameNode(F_SAME, 0, null, 0, null));
il.add(new TypeInsnNode(NEW, "java/lang/IllegalArgumentException"));
il.add(new InsnNode(DUP));
il.add(new MethodInsnNode(INVOKESPECIAL,
          "java/lang/IllegalArgumentException", "<init>", "()V"));
il.add(new InsnNode(ATHROW));
il.add(end);
il.add(new FrameNode(F_SAME, 0, null, 0, null));
il.add(new InsnNode(RETURN));
mn.maxStack = 2;
mn.maxLocals = 2;