File Doesn't work

[abhs_94]

import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.*;
import dat;
import java.awt.*;
import java.util.*;
import java.awt.event.*;




public class LinkedList1 extends Frame implements ActionListener, java.io.Serializable 
{
	

	
	
	
	Button bAdd;
	Button bDel;
	Button bFind;
	TextField tName=new TextField(40);
	TextField tId=new TextField(40);
	TextField tNum=new TextField(40);
	
		FileOutputStream outFile;
		ObjectOutputStream out;
		FileInputStream inFile;
		ObjectInputStream in;
	
	
	public static void main(String s[])
	{
		LinkedList1 l1=new LinkedList1();
		l1.setSize(300,400);
		l1.setVisible(true);
	}
	
	public void LinkedList1() 
	{
		
		bAdd=new Button("Add");
		bDel=new Button("Delete");
		bFind=new Button("Find");
		
		setLayout(new BorderLayout());
		
		Panel p;
		
		p=new Panel();
		p.add(bAdd);
		p.add(bDel);
		p.add(bFind);
		add("North",p);
		
		p=new Panel();
		p.setLayout(new GridLayout(3,2));
		p.add(new Label("Name:"));
		p.add(tName);
		p.add(new Label("Email ID:"));
		p.add(tId);
		p.add(new Label("Phone Number:"));
		p.add(tNum);
		add(p);
		
		bAdd.addActionListener(this);
		bDel.addActionListener(this);
		bFind.addActionListener(this);
		
		try
		{
			
			outFile= new FileOutputStream("file.dat");
			out = new ObjectOutputStream(outFile);
			inFile= new FileInputStream("file.dat");
			in = new ObjectInputStream(inFile);
		}
		catch(FileNotFoundException f)
		{
			System.out.println("erro");
		}
		catch(IOException io)
		{
			System.out.println("erro");
		}
		
		
		
		
		
	}
	
	public void actionPerformed(ActionEvent e) 
	{
		if(e.getSource()==bAdd)
		{
			System.out.println("Test1");
			//dat d=new dat("abhi","adgf","aiegfiyaf");
		//	out.writeObject(d);
		}
		else if(e.getSource()==bFind)
		{
		 	String sn;
		 	sn=tName.getText();
		 	dat dd;
		 	try
		 	{
		 	
		 	while(in.readObject()!=null)
		 	{
		 		dd= (dat) in.readObject();
		 		if(dd.name==sn)
		 		{
		 			tId.setText(dd.Id);
		 		}

		 	}	
		 	}
		 	catch(OptionalDataException ode)
			{
			System.out.println("erro");
			}
			catch(ClassNotFoundException ode)
			{
			System.out.println("erro");
			}
			catch(IOException io)
			{
			System.out.println("erro");
			}
		}
		
	}
}

Please ignore the name "linkedlist1". This file compiles easily but when i try to run it the frame doesn't show the panels it is supposed to. Please help

[ComputerJy]

A constructor is not a 'void' method, it has no return type. Another thing, use JFrame if possible.

And BTW Frame implements the Serializable interface, no need to redo that

package testing;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;

public class LinkedList extends Frame
{
	private static final long serialVersionUID = 6790822955604554899L;

	public static void main(final String s[])
	{
		final LinkedList l1 = new LinkedList();
		l1.setSize(300, 400);
		l1.setVisible(true);
	}

	private Button bAdd;
	private Button bDel;
	private Button bFind;

	 private TextField tName = new TextField(40);
	 private TextField tId = new TextField(40);
	 private TextField tNum = new TextField(40);

	public LinkedList()
	{
		super();
		bAdd = new Button("Add");
		bDel = new Button("Delete");
		bFind = new Button("Find");

		setLayout(new BorderLayout());
		Panel p;

		p = new Panel();
		p.add(bAdd);
		p.add(bDel);
		p.add(bFind);
		add("North", p);
		pack();

		 p = new Panel();
		 p.setLayout(new GridLayout(3, 2));
		 p.add(new Label("Name:"));
		 p.add(tName);
		 p.add(new Label("Email ID:"));
		 p.add(tId);
		 p.add(new Label("Phone Number:"));
		 p.add(tNum);
		 add(p);

	}
}

[abhs_94]

Hi,
I fixed the constructor but even without the JFrame, isn't my application supposed to run?

[ComputerJy]

It should run, but the JFrame is better than the Frame. More user-friendly, at least the X button works with the JFrame