Lambda Expression - Supplier

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Supplier

Supplier表示结果的供应者

 

Demo

SupplierTest.java

package org.fool.java8;

import java.util.function.Supplier;

public class SupplierTest {
    private static class Person {
        private String name;
        private Integer age;

        public Person(String name, Integer age) {
            this.name = name;
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public Integer getAge() {
            return age;
        }

        public void setAge(Integer age) {
            this.age = age;
        }

        @Override
        public String toString() {
            return "Person{" +
                    "name='" + name + '\'' +
                    ", age=" + age +
                    '}';
        }
    }

    private static Person createPerson(Supplier<Person> supplier) {
        return supplier.get();
    }

    public static void main(String[] args) {
        Supplier<String> supplier = String::new;
        System.out.println(supplier.get().getClass());

        Person person = createPerson(() -> new Person("zhangsan", 18));
        System.out.println(person);
    }
}

Console Output

class java.lang.String
Person{name='zhangsan', age=18}