java.lang.VerifyError: Bad type on operand stack

[cityblack]

public interface MethodInvoke { Object invoke(Object... args); }

public class Target { int hello(int value) { return value + 1; } }

CtClass enhance = pool.makeClass(MethodInvoke.class.getName+$A); // this.bean is Target instance CtMethod invoke = CtNewMethod.make("public Object invoke(Object... args) { return this.bean.hello((int)args[0]); }", enhance);

When i use the enhance class to new a object: Exception in thread "main" java.lang.VerifyError: Bad type on operand stack: Exception Details: Location: xx$A.invoke([Ljava/lang/Object;)Ljava/lang/Object; @7: invokevirtual Reason: Type 'java/lang/Object' (current frame, stack[1]) is not assignable to integer Current Frame: bci: @7 flags: { } locals: { 'xx$A', '[Ljava/lang/Object;' } stack: { 'xx$A', 'java/lang/Object' } Bytecode: 0000000: 2ab4 0010 2b03 32b6 0018 b0

Params type of Hello method is int, but methodinvoke #invoke is object []. When Java type conversion is compiled into bytecode, integer should be required, that is, this bean. hello((Integer)args[0]). But when I set it like this, I throw an exception: [source error] hello (Java. Lang. integer) not found in XX Target

Am I using it wrong? or is there any other way to do this