How do I create object using Constructor object?
Category: java.lang.reflect, viewed: 4432 time(s).
The example below using a constructor reflection to create a string object by calling String(String) and String(StringBuilder) constructors.
package org.kodejava.example.reflect;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
public class CreateObjectDemo {
public static void main(String[] args) {
Class clazz = String.class;
try {
Constructor constructor = clazz.getConstructor(new Class[] {String.class});
String object = (String) constructor.newInstance(new Object[] {"Hello World!"});
System.out.println("String = " + object);
constructor = clazz.getConstructor(new Class[] {StringBuilder.class});
object = (String) constructor.newInstance(new Object[] {new StringBuilder("Hello Universe!")});
System.out.println("String = " + object);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
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