How to SetValue Of ComboBox With Given Id Value ? - javafx

Question

I have tried the code to create a combobox with Id and Value Pair. Now I want to set the value of combobox with the specified Id passed. Example: I want to set the Value of combobox with employee name whose salary is 1400.0
package demo;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
/**
*
* #author vikassingh
*/
public class Demo extends Application {
private final ObservableList<Employee> data
= FXCollections.observableArrayList(
new Employee("Azamat", 2200.15),
new Employee("Veli", 1400.0),
new Employee("Nurbek", 900.5));
#Override
public void start(Stage primaryStage) {
ComboBox<Employee> combobox = new ComboBox<>(data);
// testing
//combobox.getSelectionModel().selectFirst();
//combobox.setValue(1400.0); // How to set value with specific Id Passed
// End testing
StackPane root = new StackPane();
root.getChildren().add(combobox);
primaryStage.setScene(new Scene(root, 300, 250));
primaryStage.show();
}
public static class Employee {
private String name;
private Double salary;
#Override
public String toString() {
return name;
}
public Employee(String name, Double salary) {
this.name = name;
this.salary = salary;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getSalary() {
return salary;
}
public void setSalary(Double salary) {
this.salary = salary;
}
}
public static void main(String[] args) {
launch(args);
}
}

Answer 1

Finding the correct Employee in the data list can be done using the same technique you'd use for any other Collection / List: iterate through the collection and find the first element that matches the criterion. The Streams API provides a simple way to do this:
Predicate<Employee> matcher = employee -> employee.getSalary() == 1400d;
Optional<Employee> opt = data.stream().filter(matcher).findAny();
combobox.setValue(opt.orElse(null)); // set found employee or null, if none was found.