customer.java

Appplet自己写的一些小程序,对新手很有帮助可以

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

public class Customer extends JApplet
{
	int custAge;
	JPanel panelObject;
	JButton buttonAccept;
	JLabel labelCustAge;
	JTextField textCustAge;
	
	void setAge(int age)
	{
		custAge = age;
	}
	
	//产生异常的代码
	/*void setAge(int age) throws IllegalAgeException
	{
		if((age<20)||(age>60))
		throw new IllegalAgeException();
		custAge = age;
	}*/
	 
	
	public void init()
	{
		panelObject = (JPanel)getContentPane();
		panelObject.setLayout(new FlowLayout());
		labelCustAge = new JLabel("enter the customer age:");
		textCustAge = new JTextField(5);
		buttonAccept = new JButton("store details");
		panelObject.add(labelCustAge);
		panelObject.add(textCustAge);
		panelObject.add(buttonAccept);
		ValidateAction validateButton = new ValidateAction();
		buttonAccept.addActionListener(validateButton);
	}
	
	class ValidateAction implements ActionListener
	{
		public void actionPerformed(ActionEvent evt)
		{
			Object obj = evt.getSource();
			
			if(obj == buttonAccept)
			{
				Customer custObj = new Customer();
				int age = Integer.parseInt(textCustAge.getText());
			
				custObj.setAge(age);
				
				//异常捕捉块
				/*try
				{
						custObj.setAge(age);
						getAppletContext().showStatus("valid entry for customer age");
				}
				
				catch(IllegalAgeException e)
				{
					getAppletContext().showStatus(e.getMessage());
				}*/
			}
		}
	}
	
	//异常类的代码
	/*class IllegalAgeException extends Exception 
	{
		public String getMessage()
		{
			return "Invalid age.......";
		}
	}*/
	
	
	
}