Spring Expression (SpEL) Ternary and Elvis Operator with Example

Open Eclipse
Click on menu New -> Others
In wizards type "Java Project" and Select "Java Project"
Click Next
Enter project name as "TernaryOperatorExample", then click Next
Goto Libraries tab, then click on Add External JARs, then select Spring's 21 Framework Jars and commons-logging-1.1.jar.
Click Finish.

Step.2 Project Explorer Preview

RunMyProgram.java

package com.springexample;
 
import java.util.Iterator;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class RunMyProgram {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        UserNameHolder userNameDetails = (UserNameHolder) context.getBean("userNameHolder");
         
        System.out.println("Usernames");
        for (Iterator nameIterator = userNameDetails.getUserNames().iterator();nameIterator.hasNext();){
            String name = nameIterator.next();
            System.out.println(name);
        }
    }
}

UserNameHolder.java

package com.springexample;
 
import java.util.ArrayList;
import java.util.List;
 
public class UserNameHolder {
    List userNames = new ArrayList();
 
    public List getUserNames() {
        return userNames;
    }
    public void setUserNames(List userNames) {
        this.userNames = userNames;
    }
}

UserNameDetails.java

package com.springexample;
 
public class UserNameDetails {
    private String firstName;
    private String lastName;
     
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
 
    <bean id="johnPeterDetails" class="com.springexample.UserNameDetails">
        <property name="firstName" value="#{'John'}" />
        <property name="lastName" value="#{'Peter'}" />
    </bean>
     
    <bean id="ramDetails" class="com.springexample.UserNameDetails">
        <property name="firstName" value="#{'Ram'}" />
    </bean>
     
    <bean id="userNameHolder" class="com.springexample.UserNameHolder">
        <property name="userNames">
            <list>
                <value>#{johnPeterDetails.firstName+" "+(johnPeterDetails.lastName != null?johnPeterDetails.lastName:' Indian')}</value>
                <value>#{ramDetails.firstName+" "+(ramDetails.lastName?:'Indian')}</value>
            </list>
        </property>
    </bean>
</beans>