Himanshu S. Soni

Hi all,

I have recently picked up application development in SWING. I have developed a couple of applications which use various components of the swing framework. But i haven't found an efficient way to structure the code in my application. I am confused as how to implement MVC for my apps. Besides this, a complex app will help me analyze the structure of the app as how the various components are coupled together.

I have a jsf tab panel which holds some links.
How can i target the result page in the same tab panel itself.
what can i use and how, jsf/richfaces ?

Hi all,
I am planning to learns Struts right from the scratch. Having a decent knowledge on JSP,JSF,MVC, i think i can sail through easily here.
From a preliminary look up, i could imply that much of the concepts in struts can be related to JSF to help me absorb them quickly.

I have some doubts regarding WHERE to start and HOW to ?
What should i study, Struts1 or Struts2 ?
How should i plan my study ?
Where do i need to focus more on ?

what i mean to say is, i have searched alot. but i could not find a proper way to use xpath for html.

The expression which i used in the above does not return any value.

hello all,

i have to extract d company name and face value from this site

i noticed that this task could be accomplished using xpath api.
since this is an html page, i am using jtidy parser.

this is the xpath for the face value which i hav eto extract.
/html/body/div[4]/div[6]/div[9]/div/table/tbody/tr[4]/td[2]

This is my code

URL oracle = new URL("http://money.rediff.com/companies/20-microns-ltd/15110088"); URLConnection yc = oracle.openConnection(); InputStream is = yc.getInputStream(); is = oracle.openStream(); Tidy tidy = new Tidy(); tidy.setQuiet(true); tidy.setShowWarnings(false); Document tidyDOM = tidy.parseDOM(is, null); XPathFactory xPathFactory = XPathFactory.newInstance(); XPath xPath = xPathFactory.newXPath(); String expression = "/html"; XPathExpression xPathExpression = xPath.compile(expression); Object result = xPathExpression.evaluate(tidyDOM,XPathConstants.NODESET); System.out.println(result.toString());
please guide me further, because, i cannot find a right solution for the above

No success.
as i said, when i comment out the implementation of onCreate(), the UI boots fine.

Test.java ------ screen 1

package com.academic.Test; import academic.Test.R; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class Test extends Activity { public static String Uname,Upass; private EditText name; private EditText pass; private Button Go; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Go = (Button) findViewById(R.id.Go1); name = (EditText) findViewById(R.id.name1); pass = (EditText) findViewById(R.id.pass1); Go.setOnClickListener(new OnClickListener(){ public void onClick(View v) { Uname = name.getText().toString(); Upass = pass.getText().toString(); launchPost(); } }); } public void launchPost() { Intent i = new Intent(getBaseContext(), Post.class); startActivity(i); } }

Post.java ------ Screen 2

package academic.Test; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class Post extends Activity{ private TextView name; private TextView pass; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.post); name = (TextView)findViewById(R.id.name1); pass = (TextView)findViewById(R.id.pass1); name.setText(Test.Uname); pass.setText(Test.Upass); } }

hello everybody,

i have started android application development recently.
Studying sample applications, Android Docs, going through some books are some of the activities, i am carrying out.

Apart from this, i wanted some suggestions on list of mini applications, which i should build to get my hands on android.

I made the changes as per your guidance. But no luck.
The application stops unexpectedly.

i will send you the project.
Tell me how to.
Please let me know what error is causing this problem.
As a result of this error, my entire practical work is halted.
I made a calculator, but the same problem persists in it too.

package academic.Test; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class Test extends Activity { public static String Uname,Upass; private EditText name; private EditText pass; private Button Go; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Go = (Button) findViewById(R.id.Go); name = (EditText) findViewById(R.id.name); pass = (EditText) findViewById(R.id.pass); Go.setOnClickListener(new OnClickListener(){ public void onClick(View v) { Uname = name.getText().toString(); Upass = pass.getText().toString(); launchPost(); } }); } protected void launchPost() { Intent i = new Intent(this, Post.class); startActivity(i); } }

This is my manifest file.
i have to screens Test -> Post. The above code resembles the Test.java activity.

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="academic.Test" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".Test" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="Post" android:label="@string/app_name"> </activity> </application> </manifest>

Are there any other places, i should check for errors ?

I am using Eclipse ADT to learn developing android application.

This simple piece of code given below is used to accept username and password from user, and display it on the next page after hitting Go button.
package academic.Test; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class Test extends Activity { public static String Uname,Upass; private EditText name; private EditText pass; private Button Go; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Go = (Button) findViewById(R.id.Go); //line 1 name = (EditText) findViewById(R.id.name); pass = (EditText) findViewById(R.id.pass); Go.setOnClickListener(new OnClickListener(){ public void onClick(View v) { Uname = name.getText().toString(); Upass = pass.getText().toString(); } }); //line 2 } }

The code has no errors as far as i know.
However, when i run this code , i get the error

The application login(process academic.login) has stopped unexpectedly.
Please try again.

One more thing which i found out, is that when i comment out from the code from line 1 to line 2. The UI boots up perfectly.
The same problem happened when i was building a calculator, which too is incomplete as a resukt of this problem.
Others sample applications run perfectly, so i am not able to pin point the errors.

Hi all,

Recently, I have started application development in android platform.
I wanted to know, where can I find good android tutorials.I have a few books which i am going through. But i cannot find a material which has more practical approach.
Video lectures would be also useful.
It's been days, since i have started, but i am not getting a right direction to proceed forward.

thanks all

Thanks a lot guys

Happy Diwali!!!
have a safe and eco friendly Diwali

Finally, I have managed to sail through the exam with a satisfactory score
OCPJP 86%
At times, I got pretty much nervous while going through Examlab.
Got an average score between 45-50%.
But on the other side, it helped a lot.
I had cramped all mock tests. To name a few
1. Examlab
2. Iquisition
3. Certpal
4. Whizlabs

Also to mention, those JavaRanch Roundup games came in handy.
Each one of them, had a different perspective. They helped me a lot to learn what can happen and what cannot.

And, On the top of all, comes the master piece, K & B
I don't need an example to measure its greatness.
Also to mention, the humor in the book worked like a cherry on the cake.
Sometimes, I used to dig through the book to read those lines.
I Want to thank all JR guys for their help.

Ohh..
Not to forget, thanks to one of the most dominant player in this game. JVM

List<?> lt = new ArrayList<Integer>(); lt.add(4);// Error can't add List<? extends Number> lt1 = new ArrayList<Integer>(); lt1.add(6);// Same as above List<? super Integer> lt2 = new ArrayList<Integer>(); lt2.add(6);//Successfully added

So what can we add in list lt and lt1.
If nothing, then wats their use??