Invoke a method of an Object in the Heap of a jvm

Is it possible to get an Object from the Heap in a JVM and call a method on it.

Lets say I have this:

public class TestObjectOnHeap {
private String name;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
    }
}

And I created a web application that instantiated the class like this

TestObjectOnHeap obj = new TestObjectOnHeap();
obj.setName("created in webapp");

Then I wanted to create a different application (maybe via a javaagent?) that read that value and printed "created in webapp"

Is this possible?