How do I pass a class as a parameter in Java?

Question

Is there any way to pass class as a parameter in Java and fire some methods from that class?

void main()
{
    callClass(that.class)
}

void callClass(???? c         


        

Answer 1

This kind of thing is not easy. Here is a method that calls a static method:

public static Object callStaticMethod(
    // class that contains the static method
    final Class clazz,
    // method name
    final String methodName,
    // optional method parameters
    final Object... parameters) throws Exception{
    for(final Method method : clazz.getMethods()){
        if(method.getName().equals(methodName)){
            final Class[] paramTypes = method.getParameterTypes();
            if(parameters.length != paramTypes.length){
                continue;
            }
            boolean compatible = true;
            for(int i = 0; i < paramTypes.length; i++){
                final Class paramType = paramTypes[i];
                final Object param = parameters[i];
                if(param != null && !paramType.isInstance(param)){
                    compatible = false;
                    break;
                }

            }
            if(compatible){
                return method.invoke(/* static invocation */null,
                    parameters);
            }
        }
    }
    throw new NoSuchMethodException(methodName);
}

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Update: Wait, I just saw the gwt tag on the question. You can't use reflection in GWT