<h:dataTable value="#{tableData.names}" var="name">
            <h:column> #{name.last},</h:column>
            <h:column> #{name.first} </h:column>
</h:dataTable>
<h:commandButton value="Test"/>
-----------------------------------
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import java.io.Serializable;

@ManagedBean
@SessionScoped
public class TableData implements Serializable {
    private static final Name[] names = new Name[]
            {
                    new Name("William", "Dupont"),
                    new Name("Anna", "Keeney"),
                    new Name("Mariko", "Randor"),
                    new Name("John", "Wilson")
            };

    public Name[] getNames() {
        System.out.println("getNames()");
        return names;
    }
};
--------------------------------------
import java.io.Serializable;

public class Name implements Serializable {
    private String first;
    private String last;

    public Name(String first, String last) {
        this.first = first;
        this.last = last;
    }

    public void setFirst(String newValue) {
        first = newValue;
    }

    public String getFirst() {
        return first;
    }

    public void setLast(String newValue) {
        last = newValue;
    }

    public String getLast()
    {
        return last;
    }
}