Java 8中新接口的使用示例

下文笔者讲述java8中,Consumer接口的功能简介说明,如下所示

Consumer接口的功能

接收参数,但不返回任何内容

Consumer接口的源码

@FunctionalInterface
public interface Consumer<T> {
  void accept(T t);
}

Java8Consumer1.java

package com.java265.java8;
import java.util.function.Consumer;
public class Java8Consumer1 {
    public static void main(String[] args) {
 
        Consumer<String> print = x -> System.out.println(x);
        print.accept("java爱好者");
    }
}

例2:Consumer作为参数,打印列表中元素
Java8Consumer2.java

package com.java265.java8;
import java.util.Arrays;
import java.util.list;
import java.util.function.Consumer;
 
public class Java8Consumer2 {
 
    public static void main(String[] args) {
 
        List<Integer> list = Arrays.asList(22,44,55,77,88,120);
  
		Consumer<Integer> consumer = (Integer x) -> System.out.println(x);
        forEach(list, consumer);
  
        forEach(list, (Integer x) -> System.out.println(x));
    }
 
    static <T> void forEach(List<T> list, Consumer<T> consumer) {
        for (T t : list) {
            consumer.accept(t);
        }
    }
}