Michael Müller - Practical JSF in Java EE 8: Web Applications in Java for the Enterprise
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- Book:Practical JSF in Java EE 8: Web Applications in Java for the Enterprise
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TinyCalculator
- Launch NetBeans.
- From the File menu, choose New Project. NetBeans displays the New Project wizard , as shown in Figure .
Figure 1-1New Project wizard - Click the category Maven, click Web Application, and then click Next. NetBeans displays the New Web Application wizard , as shown in Figure .
Figure 1-2New Web Application wizard - For the Project Name, enter TinyCalculator . You may adapt the other fields as desired, or just keep them unchanged. Its good practice to set the Group Id to the reverse notation of your domain. Click Next, keep the settings in the next dialog unchanged, and click Finish.NetBeans creates a skeleton of a new web application for you and displays it within the projects tree , as shown in Figure .
Figure 1-3Projects tree - Right-click (secondary click) TinyCalculator in the projects tree and choose Properties from the context menu. The Project Properties screen appears, as shown in Figure .
Figure 1-4Framework configuration - Choose the Frameworks category. Choose JavaServer Faces and click the Add button. Click the Configuration tab and change the contents of the JSF Servlet URL Pattern box to *.xhtml . Click OK.While adding JSF to your project, NetBeans creates a web page called index.xhtml within the web pages, keeping the formerly created index.html file.
- On the projects tree open the Web Pages node (if its not already open), as shown in Figure . Select index.html and delete it.
Figure 1-5Projects treeFrom the File menu , choose New Fileor press the shortcut key shown in the menu, which is faster than clicking. The IDE opens the New File wizard, as shown in Figure .
Figure 1-6New File wizard - Choose the category JavaServer Faces and then choose JSF Managed Bean. Click Next.The New JSF Managed Bean window appears, as shown in Figure .
Figure 1-7New JSF Managed Bean - Enter TinyCalculator as the Class Name and from Scope select request. Click Finish.NetBeans creates and opens a Java class file named TinyCalculator .
- Now, edit this class. Key in or paste the code shown in Listing .1 package de.muellerbruehl.tinycalculator ;3 import javax.inject.Named ;4 import javax.enterprise.context.RequestScoped ;6 /**7 *8 * @author mmueller9 */10 @Named11 @RequestScoped12 public class TinyCalculator {14 public TinyCalculator() {15 }17 private double _param1;18 private double _param2;19 private double _result;21 public double getParam1() {22 return _param1;23 }25 public void setParam1( double param1) {26 _param1 = param1;27 }29 public double getParam2() {30 return _param2;31 }33 public void setParam2( double param2) {34 _param2 = param2;35 }37 public double getResult() {38 return _result;39 }41 public void setResult( double result) {42 _result = result;43 }45 public String add(){46 _result = _param1 + _param2;47 return "";48 }50 public String subtract(){51 _result = _param1 - _param2;52 return "";
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