For a regular internet user I am sure that they must face the problem to remember the various web site's passwords.
Its really too difficult to manage & remember all the login information, if we are not regularly using some web accounts it may happen that after a time either we forgot login name or the password. Some time it also take long time to recollect the login information.
Some of us use same password for all the logins or use some pattern to memorize all the password which is not a good idea.
Recently searched for the same and I found a good tools for that which I have described below
This tool allow us to set a master password & other all our logins are managed.
It gives plug-in for browser, after installing the plug-in when we enter the login information it ask to save the info. once we save the info next we don't need to worry about the login info username & password are automatically inserted & also offer for auto login.
we can use this tool for form filling, Fill the form information in advance and use it when ever required.
One feature about this tool which I liked most is
we can share our password to our friends & that also without showing the password, isn't it COOL
Combines a web service with a stand-alone program
Packed with features such as automatically filling in passwords, and accessing your passwords anywhere.
Internet Explorer 6+, Firefox 2.0+, Chrome 4+, Opera 11+, Safari 5+
Freeware and also provide premium accounts with other facilities
File copy
This is a simple file copy application in which you will going know about file handling functions and also some threading concepts available in C#
Overview of application
Developed in visual studio 2008, language C#
It's a Windows forms application
Only one instance can run at a time (using SingleExecution.cs)
FileCopy.cs contain main logic for program
Defination.cs is a static class holding the labels used within program
A JPA entity is a java class referring to one row of a table
Each entity has same number fields/properties as in table structure
It can be with or without relationship
that is One to one, One to many or many to many
Consider the following table structure for one to many relationship
For above table structure two entity will be created
Categories.java (manage Categories table)
Products.java (manage product table)
//////////////////////////////////////////////////////////////////////
// CATEGORIES
package entities;
import java.io.Serializable;
import javax.persistence.*;
import java.util.List;
/**
* The persistent class for the Categories database table.
*
*/
@Entity
@Table(name="Categories")
public class Categories implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name="CategoryId", unique=true, nullable=false)
private String categoryId;
@Column(name="CategoryName")
private String categoryName;
@Column(name="Description", length=50)
private String description;
//bi-directional many-to-one association to Products
@OneToMany(mappedBy="category", cascade={CascadeType.PERSIST, CascadeType.REMOVE})
private List products;
public Categories() {
}
public String getCategoryId() {
return this.categoryId;
}
public void setCategoryId(String categoryId) {
this.categoryId = categoryId;
}
public Object getCategoryName() {
return this.categoryName;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public List getProducts() {
return this.products;
}
public void setProducts(List products) {
this.products = products;
}
}
//////////////////////////////////////////////////////////////////////
// PRODUCTS
package entities;
import java.io.Serializable;
import javax.persistence.*;
/**
* The persistent class for the Products database table.
*
*/
@Entity
@Table(name="Products")
public class Products implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name="ProductId", unique=true, nullable=false)
private String productId;
@Column(name="ProductName", length=50)
private String productName;
@Column(name="Supplier", length=50)
private String supplier;
//bi-directional many-to-one association to Categories
@ManyToOne
@JoinColumn(name="CategoryId")
private Categories category;
public Products() {
}
public String getProductId() {
return this.productId;
}
public void setProductId(String productId) {
this.productId = productId;
}
public String getProductName() {
return this.productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getSupplier() {
return this.supplier;
}
public void setSupplier(String supplier) {
this.supplier = supplier;
}
public Categories getCategory() {
return this.category;
}
public void setCategory(Categories category) {
this.category = category;
}
}
Above two class represent two tables Categories and products
You need to import javax.persistence.*
Using above classes & EntityManager we can fetch data from database
Consider the following code ....
public static void main()
{
// Creating entity manager to create Db query
EntityManagerFactory factory = Persistence.createEntityManagerFactory("WebWithJPA");
javax.persistence.EntityManager em = factory.createEntityManager();
try
{
// Creating Query using JPQL
Query objQuery = em.createQuery("select c from Categories c");
// Getting result set in List
List objC = (List) objQuery.getResultList();
// Listing all categories and its related products
for (Categories c : objC)
{
System.out.println("Category Name: " + c.getCategoryName());
for (Products p : c.getProducts())
{
System.out.println("* " + p.getProductName());
}
}
}
