couldn't output the output in gui window
this is the code , i want the code to output in gui window.i tried
JTextArea but couldn't
get output on window.suggest me what to use for this particular code
// Fig. 14.37: FileDemonstration.java
// Demonstrating the File class.
import java.lang.reflect.*;
import javax.swing.*;
public class Reverse extends JFrame
{
public Reverse()
{
analyze();
} // end Reverse constructor
//this method prints constructors of class
public static void printConstructors(Class cl)
{
Constructor[] constructors = cl.getDeclaredConstructors();
for (int i=0;i<constructors.length;i++)
{
Constructor c = constructors[i];
String name = c.getName();
System.out.print(Modifier.toString(c.getModifiers()));
System.out.print(" "+ name + "(");
//print parameter type
Class[] paramTypes = c.getParameterTypes();
for(int j=0;j< paramTypes.length ;j++)
{
if(j>0) System.out.print(",");
System.out.print(paramTypes[j].getName());
}
System.out.println(");") ;
}
}
//this method prints method of class
public static void printMethods(Class cl)
{
Method[] methods = cl.getDeclaredMethods();
for(int i=0;i<methods.length;i++)
{
Method m = methods[i];
Class retType = m.getReturnType();
String name =m.getName();
//print modifiers, return type and method name
System.out.print(Modifier.toString(m.getModifiers()));
System.out.print(" "+ retType.getName() +" "+ name + "(");
//print paramters type
Class[] paramTypes = m.getParameterTypes();
for(int j=0;j<paramTypes.length;j++)
{
if(j>0) System.out.print(", ");
System.out.print(paramTypes[j].getName());
}
System.out.println(");");
}
}
//this method prints fields of class
public static void printFields(Class cl)
{
Field[] fields = cl.getDeclaredFields();
for (int i=0; i< fields.length;i++)
{
Field f = fields[i];
Class type =f.getType();
String name = f.getName();
System.out.print(Modifier.toString(f.getModifiers()));
System.out.println(" " + type.getName() + " " + name + ";");
}
}
public void analyze()
{
String name;
name = JOptionPane.showInputDialog
("class name (java.util.date)): ");
try
{
//print class name and superclass name
Class cl = Class.forName(name);
Class supercl =cl.getSuperclass();
System.out.print("\nclass " + name);
if (supercl !=null && supercl != Object.class)
{
System.out.print(" extends " + supercl.getName());
}
System.out.print("\n{\n");
printConstructors(cl);
System.out.println();
printMethods(cl);
System.out.println();
printFields(cl);
System.out.println("}");
}
catch( ClassNotFoundException e) {e.printStackTrace();}
System.exit(0);
}//end of analyze
} // end class reverse