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If you want to see all of your java sources in debugging process even if you do not have them then use “JD-Eclipse plug-in” for your Eclipse platform. JD-Eclipse is a free plug-in for any non commercial purposes. So you can use it in any commercial software products. This plug-in can be used freely for your personal need in any commercial or non commercial environments.

JD-Eclipse plug-in

Following platforms are supported ...

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Plugins

In this section, we will explain the File I/O process in which your program will read from a text file and write to a text file. Following steps explains this process.

• Create a new Java Program in your Eclipse.
• Write the following lines of code into your Java Program.
• Compile and run the Java Program.
• It will read from a file and write it to another file.

Java Code: This is the code to read and write a file

import java.io.*;
class FileRead 
{
 public static void

...

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Eclipse Files

In this section, we will discuss some generic useful tips.

• Double click to maximize window: You can maximize or restore a panel by double clicking its header.
• Shorthand Templates: Shorthand typing is supported in Eclipse. Type the first few characters of any command and press ctrl+space and it will show you the related complete commands. It helps you in finding useful commands, help and speed up your development.
• Intelli-Sense: Press ctrl-space to activate the intelli-sense. It

...

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Eclipse Examples

Debugging a program is very important in programming. It helps you in find errors and saves lot of time. In the following steps, we will create and debug a Java Program.

1. Write a Java Program

Write a program that computes the factorial of a number n. This program should have an error and gives wrong output. We will debug this program to find the error.

2. Set Breakpoint

Break Points

...

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Debug

Follow these steps to write your first Java program in Eclipse.

1. Launch Eclipse

• Click on “eclipse.exe” is the installation director of Eclipse.
• Select a folder for your workspace.
• Close the “welcome” screen.

2. Create New Java Project

For new application, you will create a new project to keep the entire related source and other files. To create a new Java project follows these steps.

• Choose New from ...

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Eclipse Examples

Click the JFormDesigner button in toolbar of Eclipse. Also it can be initiated using following short keys.
• For Windows (Ctrl+Shift+V)
• For Mac (Shift+Command+V)

To create a new form using Eclipse’s Package Explorer, select destination folder and right click. It will open following dialog box.

Create new Form in Eclipse

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Eclipse GUI

Eclipse Plug-ins provides following benefits as compared to other development environments.

• Integrated editor to create and design in Eclipse.
• It uses current project’s source folders and classpath.
• When you make changes in design, it changes in code accordingly.
• In Java editor, you can fold generated Java code.
• In Java editor, you can navigate to event handlers.
• Strings in designer and properties file have two way synchronization. ...

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Eclipse Plugin

To debug a Java Program in Eclipse, it allow to setup “conditional break points”. Conditional break points are based on conditions. Your debugging thread will stop when the specified condition is matched at the break point line.

To setup a new conditional break point follow these steps.

• Double click on the required line in your code on which you are interested to setup break point.
• Right click -> Properties -> Insert condition.

The ...

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Eclipse Debug

The Android project has a large size and it causes memory issues while compiling this project. To avoid such memory issues, increase memory size. To increase the memory size, edit “eclipse.ini” file. This file is located at following location:

Java Code:

/Applications/eclipse/Eclipse.app/Contents/MacOS/eclipse.ini

Default memory parameters are as shown below.

Java Code:

-Xms40m 
-Xmx256m 
-XX:MaxPermSize=256m

Following ...

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Eclipse Android

Follow these steps to set up remote debugging in Eclipse.

• Open your java project.
• Select project.
• Click Run -> Debug Configurations as shown below.

Debug Configurations

• A new dialog box will open with different configuration options. Select “Remote Java Application as shown below.

Debug Configurations Option with Remote Java

...

Updated 02-11-2012 at 03:50 PM by Eclipse

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Eclipse Remote

Eclipse Memory analyzer (MAT) is used to analyze memory leaks in your application. If an object has no reference, it is released by Java Garbage Collector. In a situation you get OutOfMemoryError, you can instruct Java Virtual Machine to create heap dump. The Eclipse Memory Analyzer provides a visual image of Java heap dump and helps to identify memory leaks. Use the following command to guide JVM to create a heapdump.

XX:+HeapDumpOnOutOfMemoryError

...

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Eclipse Web , Eclipse Memory

Eclipse is an extendible integrated development environment, which is open source platform and supports integration of new plug-ins. Eclipse supports building of new tools that can be integrated with it. Other than core runtime environment, everything in Eclipse is a plug-in. All the plug-ins are developed and integrated in almost same way.

In this section, we will discuss on installing an Eclipse plug-in. below image shows the Eclipse SDK folder.

...

Updated 02-11-2012 at 03:46 PM by Eclipse

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Eclipse Plugin , Eclipse Install

To deploy an Eclipse plug-in, deploy following into Eclipse intallation’s plug-in folder.

• Manifest File
• Jar Files
• Any other resources

Now Eclipse can activate this plug-in when it is required to perform some functionality. To activate a plug-in:

• Load runtime class
• Instantiate it
• Initialize it

Plug-in class is responsible for doing special tasks like allocation and reallocation of resources. For some ...

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Eclipse Plugin

Plug-in is a component that supports a particular service or functionality in the Eclipse workbench. This component can be integrated into system at deployment time. Eclipse supports a wide variety of these plug-ins that can work together to support an environment for development. A plug-in in Eclipse is embodied in plug-in runtime class instance. This class provides some configuration functionality for the plug-in instance. A plug-in class must extend org.eclipse.core.runtime.Plugin which is an ...

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Eclipse Plugin

1. Setup Eclipse for Web Development

• Install Eclipse for Java EE
• Install a web server like tomcat of glassfish
• Configure web server in your Eclipse

o Launch Eclipse->Window->Preference->Server Node->Runtime Environment->Add->Expand Apache and add tomcat

2. Hello Word JSP

• Create a new Web Application

o File->New->Dynamic Web Project
o Enter “HelloJSP” as project name and enter finish

...

Tags: application development, eclipse ide

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Eclipse J2EE , Eclipse Development

Eclipse is based on plug-ins and uses them to provide core functionality as compared to different other application where hard coded functionality is normally used. Eclipse is based on a runtime system called Equinox that is an implementation of OSGi core framework specification.
This plug-ins is software components that allow Eclipse to extend using other languages like Python or C. Also this plug-ins provides support to work with network applications. Using this plug-ins, you can write ...

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Eclipse Framework

Eclipse is an integrated development environment (IDE) that provides a software development environment and supports plug-ins. Eclipse is developed mostly in Java and it is used to develop Java applications with the help of plug-ins. Eclipse is also know as Eclipse ADT(Ada Development Toolkit) for Ada, for C/C++ it is called CDT, for Java it is called JDT and for PHP it is called PDT.

It is released under Eclipse Public License; it is open source and free software. Below figure shows ...

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Eclipse Framework

Android SDK contains different types of Dialogs. These dialogs include following:

• Dialog: Base class for all dialogs as shown in figure. It is usually used to inform user and is the simplest form of a dialog.
• AlertDialog: This dialog contains a number of buttons as shown in figure. It is used to get user confirmation on some specific operations like delete a file.
• CharacterPickerDialog: It is used to pick an accented character that is associated with base character. ...

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Android Dialog

Android platform has a strong security model. It is based on Linux kernel and used its security as part of Android security model. Android application exists and run in its own virtual machine and it operates within boundaries of its Linux user account. Below figure explains this security model in depth.

First declare access permissions in the Android manifest file before an application can access a privileged resource on its handset. It’s ensures security and enables that android ...

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Android Permission

XML files that are called “layouts” are used to define Android application user interface screens. The XML files are a special type of resource and treated as a resource. These XML files are used to describe screen layout like how this screen will look like. This layout resource can be considered as a template. A layout resource is filled with different supported view controls which may refer to other resources like colors, strings, drawables and dimensions.

These XML resources are ...

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Android Layout

Android has a powerful logging utility class that is called “android.util.Log”. Different log messages are categorized in different groups with errors being the most severe. Following table list some popular methods of the Log class.

Android Log Table

First parameter passed to each Log method is a tag and its data type is String. The most common practice is to define a global static string that represents the complete application ...

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Android Log

Normally, activity classes within application’s package are launched. There are cases in which applications are interested in launching external activity class in other applications with suitable permissions. You can initialize applications by creating intent actions such as following:

• Built-in web browser is launched and a URL address is supplied.
• A web browser is launched and search string is supplied.
• Built-in Dialer application is launched and a phone number ...

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Android Launch , Android Intent

Call the startActivity() method of the application context. It is most commonly used to launch the activity. startActivity() method takes only one parameter which is called Intent. The below code shows a startActivity() method with an explicit intent.

Java Code: This is the code to launch an activity

startActivity(new Intent(getApplicationContext(),MenuActivity.class));

In the above code, target activity is launched on request of intent, called MenuActivity. This MenuActivity class must be registered ...

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Android Launch , Android Context , Android Activity

You can take screenshots of the emulator or handsets which is very useful for debugging as shown in figure below.
When you are using real devices, this screenshot aspect of DDMS perspective is very helpful. Follow below steps, to take a screen shot of your device and see what is happening.

1. Select your device or emulator from DDMS perspective. The device you are selecting must be connected with USB data cable.
2. Select your desired screen on the device or emulator. ...

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Android Emulator , Android Device , Android Screenshot

To load Android application on your device, plug your Android device using USD data cable to your computer. Also check you debugging setting to confirm that you have configured this device for debugging. Follow these steps to make sure that you are using correct settings for debugging.

• From Java perspective, select Run -> Debug configurations.
• Double click your configurations.
• Change your “Deployment Target Selection Mode” to manual on Target tab. You can get ...

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Android Launch , Android Device

Using DDMS Emulator control tab, incoming voice calls can be simulated. It is not a real call and no voice or other data is transmitted between the 2 parties. It is just a simulation of incoming calls as shown in below figure.

Simulating Incoming Calls to the Emulator

Follow below steps to simulate incoming call on your emulator that is running on your server.
• Select emulator instance to call in the DDMS perspective. ...

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Android Emulator , Android Call

In Eclipse there is DDMS perspective added by ADT plug-in, in addition to other normal Debug perspective. It supports code debugging and stepping through code. When your application is running, you can view this perspective in Eclipse. Click the Android DDMS icon in top right corner to launch DDMS perspective. If you want to switch to any other perspective, simple choose it from the right top corner of the Eclipse.

Debugging Android Applications

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Android Debug

To launch the application using Android, you can launch it by clicking the “Debug” button from launch configuration screen. Also you can launch it by clicking the button on Eclipse toolbar. Then select the created debug configuration from the list. When you will click the “Debug” button, the emulator will launch as show below. It may take some time.

Android Emulator

Your application will run as shown in figure below. It’s just easy ...

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Android Launch , Android Emulator , Android and Eclipse

To run or debug an application in Eclipse, you have to create configuration for this. To create run or debug configuration, follow these steps.

1. Select Run -> Debug Configuration from menu. Also you can select debug configuration option from the Eclipse toolbar.
2. To create a new entry, double click Android Application item.
3. Edit “New_configuration” entry.
4. Rename the configuration.
5. Click the “Browse” button and set the project.
6. ...

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Android and Eclipse , Android Configuration , Android Debug

In this section we will explain different files automatically created with a new android project in eclipse.

• AndroidManifest.xml: Main configuration’s file for the application.
• default.properties: Build file used by Eclipse and Android ADT plug-in.
• proguard.cfg: Build file used by Eclipse, ProGuard, and the Android ADT plug-in. You can edit and configure this file to optimize your code.
• src folder: This folder contains all the source code.
• Activity.java: ...

Tags: android, project files

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Android and Eclipse , Android Project