how to call class using String

[newbiejava]

Hello All,

I store class name into a string. ie. String classname = "MyClass1"
how to call it using String ? ( in my case I want to call MyClass1 using classname)

could any body please help?

thanks & regards

[PhHein]

I am sure you do not want/need to do that. What are you trying to achieve?

[newbiejava]

Hi

I store class-name into a table..

import java.lang.reflect.*;

String classname = cls1.getClassName(Class1.getModelName());
Class cp1 = Class.forName(classname);

'then I don't know how to call method name inside the class? :confused:

[Norm]

Look at the java.lang.reflect package. It has classes and methods for calling methods in classes whose names are determined at execution time.

[newbiejava]

Hi..

I tried java.lang.reflect. but I am facing with warning below:

non-varargs call of varargs method with inexact argument type for last parameter;
cast to java.lang.Class for a varargs call
cast to java.lang.Class[] for a non-varargs call and to suppress this warning

import java.lang.reflect.*;

String classname = "myclass";
String fcn = "learn1." + classname;
Class c = Class.forName(fcn);
Method meth = c.getMethod("mystart", null);


========================================
public class MyClass1  {
     Class1 cls1 = new Class1();
     public void mystart() {
         cls1.msgBox(null, "HELLO MYSTART", Class1.MESSAGE_INFO);
     }
}

[newbiejava]

just want to share to someone like me, new to java (learning by doing..:))

String fcn = "learn." + classname;
Class c = Class.forName(fcn);
Method meth = c.getMethod("run");
Object theObject = c.newInstance();
meth.invoke(theObject);