Java新特性解读JDK8之函数式接口Consumer

package java.util.function;
import java.util.Objects;
/**
 * Represents an operation that accepts a single input argument and returns no
 * result. Unlike most other functional interfaces, {@code Consumer} is expected
 * to operate via side-effects.
 *
 * <p>This is a <a href="package-summary.html">functional interface</a>
 * whose functional method is {@link #accept(Object)}.
 *
 * @param <T> the type of the input to the operation
 *
 * @since 1.8
 */
@FunctionalInterface
public interface Consumer<T> {


    /**
     * Performs this operation on the given argument.
     *
     * @param t the input argument
     */
    void accept(T t);
    }

package com.example.functionalinterfacedemo;


import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;


public class ConsumerDemo {
  public static void main(String[] args) {
    
    //定义函数
    Consumer<String> consumer=obj->{
      System.out.println(obj+"消费完成");
    };
    consume("jack",consumer);
    
    //简单写法
    consume("tony",obj->{
      System.out.println(obj+"消费完成");
    });
    
    //常用于集合遍历
    List<String> asList = Arrays.asList("11","22","33");
    asList.forEach(obj->{System.out.println(obj);});
    
  }
  public static void consume(String name,Consumer<String> consumer){
    consumer.accept(name);
  }
}