Calculator help needed desperately!

[swedishfished]

Help! I really need some help with this calculator I am trying to make. Please give me some criticism (I'm a big boy, I can take it).
Here is the code:

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import javax.swing.JOptionPane;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComboBox;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.UIManager;
import java.awt.Component;
import java.util.HashSet;
import java.util.Set;
import java.lang.reflect.Array;


public class tuna extends JFrame {

		
	

private JTextField number1;
private JTextField number2;
private JTextField finalanswer;
private JComboBox operation;
	public tuna(){
		super("Basic Calculator");
		setLayout(new FlowLayout());
		number1= new JTextField("Enter the first number: ",5);
		number2 = new JTextField("Enter the second number: ", 5);
		finalanswer = new JTextField(5);
		finalanswer.setEditable(false);
		String[] operators = {"times", "plus", "minus", "divided by"};
		operation = new JComboBox(operators);
		add(number1);
		add(operation);
		add(number2);
		add(finalanswer);
		thehandler handler= new thehandler();
		number1.addActionListener(handler);
		number2.addActionListener(handler);
		operation.addActionListener(handler);
		finalanswer.addActionListener(handler);
	}
	private class thehandler implements ActionListener{
		public void actionPerformed(ActionEvent event){
			if(event.getSource()==number1 || event.getSource()==number2){
				
				String y=number1.getText();
				String x=number2.getText();
				int a=Integer.parseInt(y);
				int b=Integer.parseInt(x);
				String[] operators = {"times", "plus", "minus", "divided by"};
				String op=(String)operation.getSelectedItem();
				int counter = 0;
switch(op.charAt(0)){

case 't':
int result=a*b;
JOptionPane.showMessageDialog(null,result);
case 'p':
int result2=a+b;
JOptionPane.showMessageDialog(null,result2);

case 'm':
	int result3=a-b;
	JOptionPane.showMessageDialog(null,result3);

case 'd':
	int result4=a/b;
	JOptionPane.showMessageDialog(null,result4);

}
				}	
			String op=(String)operation.getSelectedItem();
			char child = op.charAt(0);

		}	
	}


}

import javax.swing.JFrame;
class apples {
public static void main(String args[]){
	
	tuna object1=new tuna();
	object1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	object1.setSize(500,500);
	object1.setVisible(true);

}
}

[DarrylBurke]

Do you have a specific question, or did you just want a code review? If the latter, I shall move this thread to Reviews/Advertising.

db

[swedishfished]

Mostly just a code review thanks

[DarrylBurke]

Moved from New to Java

db