I have a java class like below which I want to create an instance of this class dynamically by using class name.
class Demo {
public Demo(String... s) {
//some initialization here.
}
}
And I want to create an object using following code
Class<?> klass = Class.forName("Demo");
Constructor<?> con = klass.getConstructor("**what should be here**");
Object obj = con.newInstance(param1, param2, ...);
String...
is just String[]
so you can use
Constructor<?> con = klass.getConstructor(String[].class);
Note that you need to invoke the constructor like
Object o = con.newInstance((Object) new String[] {"first", "second", "more"});
with the cast to (Object)
for a varargs invocation.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.