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Friday, 6 July 2018

GWT Google Charts - Environment Setup



GWT Google Charts - Environment Setup

This tutorial will guide you on how to prepare a development environment to start your work with Google Charts and GWT Framework. This tutorial will also teach you how to setup JDK, Tomcat and Eclipse on your machine before you setup GWT Framework −

System Requirement

GWT requires JDK 1.6 or higher so the very first requirement is to have JDK installed in your machine.
JDK1.6 or above.
Memoryno minimum requirement.
Disk Spaceno minimum requirement.
Operating Systemno minimum requirement.
Follow the given steps to setup your environment to start with GWT application development.

Step 1 - Verify Java Installation on your Machine

Now open console and execute the following java command.
OSTaskCommand
WindowsOpen Command Consolec:\> java -version
LinuxOpen Command Terminal$ java -version
MacOpen Terminalmachine:~ joseph$ java -version
Let's verify the output for all the operating systems
Sr.No.OS & Generated Output
1
Windows
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b07)
Java HotSpot(TM) Client VM (build 17.0-b17, mixed mode, sharing)
2
Linux
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b07)
ava HotSpot(TM) Client VM (build 17.0-b17, mixed mode, sharing)
3
Mac
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b07)
Java HotSpot(TM)64-Bit Server VM (build 17.0-b17, mixed mode, sharing)

Step 2 - Setup Java Development Kit (JDK)

If you do not have Java installed then you can install the Java Software Development Kit (SDK) from Oracle's Java site: Java SE Downloads. You will find instructions for installing JDK in downloaded files, follow the given instructions to install and configure the setup. Finally set PATH and JAVA_HOME environment variables to refer to the directory that contains java and javac, typically java_install_dir/bin and java_install_dir respectively.
Set the JAVA_HOME environment variable to point to the base directory location where Java is installed on your machine. For example
Sr.No.OS & Output
1
Windows
Set the environment variable JAVA_HOME to C:\Program Files\Java\jdk1.6.0_21
2
Linux
export JAVA_HOME = /usr/local/java-current
3
Mac
export JAVA_HOME = /Library/Java/Home
Append Java compiler location to System Path.
Sr.No.OS & Output
1
Windows
Append the string ;%JAVA_HOME%\bin to the end of the system variable, Path.
2
Linux
export PATH=$PATH:$JAVA_HOME/bin/
3
Mac
not required
Alternatively, if you use an Integrated Development Environment (IDE) like Borland JBuilder, Eclipse, IntelliJ IDEA, or Sun ONE Studio, compile and run a simple program to confirm that the IDE knows where you installed Java, otherwise do proper setup as given document of the IDE.

Step 3 - Setup Eclipse IDE

All the examples in this tutorial have been written using Eclipse IDE. So I would suggest you should have latest version of Eclipse installed on your machine based on your operating system.
To install Eclipse IDE, download the latest Eclipse binaries from https://www.eclipse.org/downloads/. Once you downloaded the installation, unpack the binary distribution into a convenient location. For example in C:\eclipse on windows, or /usr/local/eclipse on Linux/Unix and finally set PATH variable appropriately.
Eclipse can be started by executing the following commands on windows machine, or you can simply double click on eclipse.exe
%C:\eclipse\eclipse.exe
Eclipse can be started by executing the following commands on Unix (Solaris, Linux, etc.) machine −
$/usr/local/eclipse/eclipse
After a successful startup, if everything is fine then it should display result

Step 4: Install GWT SDK & Plugin for Eclipse

Follow the instructions given at the link Plugin for Eclipse (incl. SDKs) to install GWT SDK & Plugin for Eclipse version installed on your machine.
After a successful setup for the GWT plugin, if everything is fine then it should display following screen with Google icon marked with red rectangle.

Step 5: Install Google Charts

Download the latest Google Charts jar from its MVN Repositorypage and add it to project's classpath.
Add the following entry in <project-name>.gwt.xml file
<inherits name = "com.googlecode.gwt.charts.Charts"/>

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