How to check for class at runtime

[ankursaxena]

Hi, I have 2 objects coming in to the socket, I have to see what class is it, whether it is Vector or Alarms class..how do i do this? If I have read the object into Object obj variable.

Thanks
Ankur

 

[pratham123]

import java.io.*;

public class RTTI {

public static void main(String args[]) {
printRTTI(new Integer(7));
printRTTI(new DataOutputStream(System.out));
}

public static void printRTTI(Object o) {

if (o == null) {
System.out.println("This object is null");
return;
}
Class c = o.getClass();
printHierarchy(c);
printInterfaces(c);
printClassLoader(c);

}

static void printHierarchy(Class c) {
System.out.println(c.getName());
while ((c = c.getSuperclass()) != null) {
System.out.println("extends " + c.getName());
}

}

static void printInterfaces(Class c) {
Class[] ci = c.getInterfaces();
if (ci.length > 0) {
if (c.isInterface()) {
for (int i = 0; i < ci.length; i++) {
System.out.println("extends" + ci.getName());
}
}
else {
System.out.println("implements ");
for (int i = 0; i < ci.length; i++) {
System.out.println(ci.getName() + ",");
}

}
}
}

static void printClassLoader(Class c) {
ClassLoader cl = c.getClassLoader();
if (cl != null) System.out.println("This object was loaded by " + cl);
}

}

 

[sedj]

Would it not be easier to just do :

Object incoming ...
if (incoming instanceof java.util.Vector) {

} else if (incoming instanceof Alarm) {

} else {

}

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