Function Employee Demo

Employee对象

public class Employee {

    private String id;
    private String name;
    private int age;
    private String hobby;
    private String address;

    public Employee() {
        this.id = "auto:"+UUID.randomUUID().toString();
    }

    public Employee(String id) {
        this.id = id;
    }

    public Employee(String id, String name) {
        this.id = id;
        this.name = name;
    }

    public Employee(String id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public Employee(String id, String name, int age, String hobby) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.hobby = hobby;
    }


    @Override
    public String toString() {
        return "Employee{" +
                "id='" + id + '\'' +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", hobby='" + hobby + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

        // 无构造函数 需要通过Supplier来实现
        Supplier<Employee> supplier = Employee::new;
        Employee noPara = supplier.get();
        System.out.println("noPara="+noPara);

        // 1个参数构造函数
        Function<String,Employee> oneParaFunction = (s) -> new Employee(s);
        Employee onePara = oneParaFunction.apply("1");
        System.out.println("onePara="+onePara);

        // 2个构造函数
        BiFunction<String,String,Employee> twoParaFunction = (id, name) -> new Employee(id,name);
        Employee twoPara = twoParaFunction.apply("2","two");
        System.out.println("twoPara="+twoPara);

        // 3个构造函数  2个以上需要自己扩展接口 ThreeFunction
        ThreeFunction<String,String,Integer,Employee> threeFunction = (id,name,age) -> new Employee(id,name,age);
        Employee threePara = threeFunction.apply("3","three",18);
        System.out.println("threePara="+threePara);

        // 4个构造函数 FourFunction
        FourFunction<String,String,Integer,String,Employee> fourFunction = (id,name,age,hobby) -> new Employee(id,name,age,hobby);
        Employee fourPara = fourFunction.apply("4","four",18,"football");
        System.out.println("fourPara="+fourPara);