Mega Code Archive
Use reflection to dynamically discover the capabilities of a class
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import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
public class Main {
public static void main(String args[]) throws Exception {
Class c = Class.forName("MyClass");
Constructor constructors[] = c.getDeclaredConstructors();
Object obj = null;
for (Constructor cons : constructors) {
Class[] params = cons.getParameterTypes();
if (params.length == 1 && params[0] == int.class) {
obj = cons.newInstance(10);
break;
}
}
if (obj == null) {
System.out.println("Can't Create MyClass object.");
return;
}
}
}
class MyClass {
private int count;
MyClass(int c) {
System.out.println("MyClass(int):" + c);
count = c;
}
MyClass() {
System.out.println("MyClass()");
count = 0;
}
void setCount(int c) {
System.out.println("setCount(int): " + c);
count = c;
}
int getCount() {
System.out.println("getCount():" + count);
return count;
}
void showcount() {
System.out.println("count is " + count);
}
}
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