Java Queries Here..

[Bandu]

^^ I hope thats not a school assignment.

Anyways, the logic is pretty simple.
(1) Have an outer loop iterate thru 0 to 4. End it with System.out.println().
(2) Have an inner loop iterate through 0 till i and print a single *.

The above steps will give you the first part of the pattern. Reverse the logic to get the lower half.

- Bandu.
P.S. There are other ways to do this and there might be more simpler ways as well.

for(int i = 0; i < 4; i++, System.out.println())
            for(int j = 0; j <= i; j++)
                System.out.print("*");

Edit: The thread subscription email that I received has a different pattern. If it is the exact opposite of whats seen in the thread, then u'll have to slightly modify the loop structures:

for(int i = 0; i < 4; i++, System.out.println())
  {
   for(int j = 4; j > i; j--)
    System.out.print(" ");
   for(int k = 0; k <= i; k++)
    System.out.print("*");
  }

 

[furious_gamer]

^^ I hope thats not a school assignment.

Anyways, the logic is pretty simple.
(1) Have an outer loop iterate thru 0 to 4. End it with System.out.println().
(2) Have an inner loop iterate through 0 till i and print a single *.

The above steps will give you the first part of the pattern. Reverse the logic to get the lower half.

- Bandu.
P.S. There are other ways to do this and there might be more simpler ways as well.

for(int i = 0; i < 4; i++, System.out.println())
            for(int j = 0; j <= i; j++)
                System.out.print("*");

Edit: The thread subscription email that I received has a different pattern. If it is the exact opposite of whats seen in the thread, then u'll have to slightly modify the loop structures:

for(int i = 0; i < 4; i++, System.out.println())
  {
   for(int j = 4; j > i; j--)
    System.out.print(" ");
   for(int k = 0; k <= i; k++)
    System.out.print("*");
  }

He just ask the logic, but u provide him the code....

 

[Bandu]

He just ask the logic, but u provide him the code....

I kinda disappointed Aniruddh the last time with his Electronic showroom thing, and he's really at a very early stage of learning, so I thought it might help him better this way than exchaning multitude of PM's and emails for a trivial thing as this.

- Bandu.

 

[aniruddhc]

Bandu I need to make the pattern in a diamond shape... The digit forum fsoftware doesnt allow me to post it in a diamond way

i think i need 6 loops, but i am not sure...

your logic unfortunately does not work...

 

[Bandu]

@Aniruddh, post your required output enclosed in [ CODE] [/ CODE].

your logic unfortunately does not work...

*i38.tinypic.com/33l2q81.jpg

 

[Desi-Tek.com]

how to use java persistence api in core java?

 

[chandru.in]

^^ See here.

*en.wikibooks.org/wiki/Java_Persistence/Runtime#Java_Standard_Edition

 

[Desi-Tek.com]

^^ See here.

*en.wikibooks.org/wiki/Java_Persistence/Runtime#Java_Standard_Edition

that example is for ejb which require application server but i want to use jpa in core java application.

 

[chandru.in]

See the section titled "Java Standard Edition".

It does work without Java EE server.

 

[Desi-Tek.com]

but how to use it with core java? do u have any example?

 

[chandru.in]

Core Java == Java SE.

I feel the code snippet there is good enough (if you have already worked with JPA in Java EE apps).

 

[Desi-Tek.com]

i think i found the solution EntityManager can only be injected in ejb
*saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=78&t=003857

i'll try with spring

 

[chandru.in]

As the URL I provided clearly says, it is not injected but rather should be created by code.

EntityManagerFactory factory = Persistence.createEntityManagerFactory("acme");
EntityManager entityManager =  factory.createEntityManager();
...
entityManager.close();

 

[Desi-Tek.com]

ah it worked thanks

package com.ocricket.entity;


import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;

import org.apache.log4j.Logger;

/**
 * 
 */
public class EntityManagerUtil {
    
    private static final EntityManagerFactory emf; 
    private static final ThreadLocal<EntityManager> threadLocal;
    Logger log = Logger.getLogger(EntityManagerUtil.class);

    
    static {
        emf = Persistence.createEntityManagerFactory("OCRICKETPU");         
        threadLocal = new ThreadLocal<EntityManager>();
        
}
        
    public static EntityManager getEntityManager() {
        EntityManager manager = threadLocal.get();        
        if (manager == null || !manager.isOpen()) {
            manager = emf.createEntityManager();
            threadLocal.set(manager);
        }
        return manager;
    }
    
     public static void closeEntityManager() {
        EntityManager em = threadLocal.get();
        threadLocal.set(null);
        if (em != null) em.close();
    }
    
    public static void beginTransaction() {
        getEntityManager().getTransaction().begin();
    }
    
    public static void commit() {
        getEntityManager().getTransaction().commit();
    }  
    
    public static void rollback() {
        getEntityManager().getTransaction().rollback();
    } 
    
    public static Query createQuery(String query) {
        return getEntityManager().createQuery(query);
    }
    

    
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="*java.sun.com/xml/ns/persistence"
    xmlns:xsi="*www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="*java.sun.com/xml/ns/persistence
    *java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0">

    <persistence-unit name="OCRICKETPU"
        transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <properties>
            <property name="hibernate.connection.driver_class"
                value="org.postgresql.Driver" />
            <property name="hibernate.connection.url"
                value="jdbc:postgresql://localhost:5432/ocricket" />
            <property name="hibernate.connection.username"
                value="postgres" />
            <property name="hibernate.connection.password"
                value="000000" />
            <property name="databasePlatform"
                value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="hibernate.use_sql_comments" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="create" />


        </properties>
    </persistence-unit>

</persistence>

 

[chandru.in]

You are welcome.

Java rocks!!

 

[dashang]

I am looking for code to create login java program in which user enter pass if its correct run remaining program else terminate/ Help me guys. I am having problem with whowing '*' as display how to do it???

 

[chandru.in]

You have not mentioned the type of app you are creating. So I'm suggesting for both desktop and web apps.

Desktop App:

Use the JPasswordField swing component.

Normal Web App:

Use <input type="password" />

JSF Web App:

Use <h:inputSecret />

 

[dashang]

Hey chandru can you give of full code from importing classes till end. Just give me password match code that is code for " getting pass and matching it and showing stars in pass while writing(optional)

 

[Desi-Tek.com]

do u want it for web application?

or desktop application?

 

[chandru.in]

Hey chandru can you give of full code from importing classes till end. Just give me password match code that is code for " getting pass and matching it and showing stars in pass while writing(optional)

Going through the TLD docs and Java docs of the class and Tag I provided you should clarify everything for you.