Problem Solving #3:
JVM
ICS201-071
Outline
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Review of Key Topics
Problem 1
Problem 2
Problem 3
Problem 4
2
Form Groups of 3 Students and
Work on the Following Problem
Review of Main Topics
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JVM
Reflection
– At runtime, the Java programmers can
inspect various information including
name of the class of a given object
 name of the superclass of that class
 names of interfaces that class
 methods that belong to that class
 etc
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Problem 1
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Write a program to show that each
loaded type has only one instance of
java.lang.Class associated with it,
irrespective of how many times it is
used in a class.
Solution: Show Source Code
Then run it in JCreator to
check the output
5
Problem 2
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Write a program to create an object
of type String. Then print out the
type of this object, its superclass, its
package, all constructors, all
methods, and all fields defined in this
type.
Solution: Show Source Code
Then run it in JCreator to
check the output
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Problem 3
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Modify the solution for problem 2 to
prompt the user to type a class or an
interface full name then print out
whether the entered name is a class
or interface,
– All other information as in problem 2
Solution: Show Source Code
Then run it in JCreator to
check the output
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Problem 4
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Modify the solution for problem 3 to
print out all the classes on the path
starting from the entered class name
till the Object class in addition to all
as in problem 2
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