Write
a java program to
find name of the class and its
super class name by passing the class name at runtime?
Answer:
class ref1
{
public static void main (String [] args)
{
if (args.length==0)
{
System.out.println
("PLEASE PASS THE CLASS NAME..!");
}
else
{
try
{
Class c=Class.forName (args
[0]);
printSuperclass
(c);
}
catch (ClassNotFoundException cnfe)
{
System.out.println
(args [0]+" DOES NOT EXISTS...");
}
}// else
}// main
static void printSuperclass (Class
c)
{
String s=c.getName ();
Class sc=c.getSuperclass ();
String sn=sc.getName ();
System.out.println
(sn+" IS THE SUPER CLASS OF "+s);
}// printSuperclass
}// ref1
Output:
java ref1 java.awt.TextField
java.awt.TextComponent
IS THE SUPER CLASS OF java.awt.TextField
Q)
Write a java program to
print super
class hierarchy at a current class which is passed from
command prompt?
Answer:
class Hierarchy
{
public static void main (String [] args)
{
if (args.length==0)
{
System.out.println
("PLEASE PASS THE CLASS NAME..!");
}
else
{
try
{
Class c=Class.forName (args
[0]);
printHierarchy
(c);
}
catch (ClassNotFoundException cnfe)
{
System.out.println
(args [0]+" DOES NOT EXISTS...");
}
}
}
static void printHierarchy (Class
c)
{
Class c1=c;
String cname=c1.getName ();
System.out.println
(cname);
Class sc=c1.getSuperclass ();
while (sc!=null)
{
cname=sc.getName ();
System.out.println
(cname);
c1=sc;
sc=c1.getSuperclass ();
}
}
};
Output:
java Hierarchy java.awt.TextField
java.awt.TextField
java.awt.TextComponent
java.awt.Component
java.lang.Object
