Hi Friend,

1) Try the following code:

import java.awt.*;
import java.applet.*;

public class StringColor extends Applet{
      public void paint(Graphics g){
      g.setColor(Color.red); 
      g.setFont(new Font(null,Font.BOLD,20));  
      g.drawString("Hello",100,100);
 }
}

2)

import java.awt.*;
import java.applet.*;
import javax.swing.*;
import java.awt.event.*;

public class Converter extends Applet{
    Label lab1,lab2;
    TextField text;
    Button button;
     public void init(){
     lab1=new Label("Enter temperature in Celsius: ");
     text=new TextField(20);
     button=new Button("Find");
     Panel p=new Panel(new GridLayout(2,2));
     Panel panel=new Panel();
         p.add(lab1);
         p.add(text);
         p.add(button);
         add(p);

         button.addActionListener(new ActionListener(){
          public void actionPerformed(ActionEvent e){
          String value=text.getText();
          double c=Double.parseDouble(value);
          double f=(c*1.8) + 32;
          JOptionPane.showMessageDialog(null,"Temperature In Fahrenheit is: "+Double.toString(f));
          }
         });
     }
}

3)For inheritance, visit the following:

http://www.roseindia.net/java/language/inheritance.shtml

Thanks