import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class important
{
public static void main(String args[])
{
JTextArea outarea= new JTextArea(400,50);
Human person = new Human();
Student learner = new Student();
person.setName("mary Smith");
person.setAge(23);
learner.setName("willoiam smith");
String nn=learner.getName(); // eg inheritance
JOptionPane.showMessageDialog(null," "+nn);
learner.setRank();
String out="name " +person.getName()+" "+learner.getRank();
outarea.setText(out);
JOptionPane.showMessageDialog(null,outarea);
System.exit(0);
}
}
public class Human
{
private String name= new String();
private int age;
public Human()
{
name=" ";
age=0;
}
public void setName(String st)
{
name=st;
}
public void setAge(int ag)
{
age=ag;
}
public String getName()
{
return(name);
}
}
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class Student extends Human
{
private int total_hours;
private char rank;
public Student()
{
total_hours=0;
rank=' ';
}
public void setRank()
{
String rr=JOptionPane.showInputDialog("enter code 1 2 3 4 ");
rank=rr.charAt(0) ;
}
public char getRank()
{
return (rank);
}
}
