測試下java函數式編程的幾個接口

//看着很簡潔，就是有點難理解

public class Iterator_test {

public static void main(String[] args) {

    List<String> list=new ArrayList<>();
	
    list.add("343");
    list.add("343434");
	
    //使用Consumer接口
	
    //函數式編程,消費者
	
    list.forEach((String s)-> {System.out.println(s);});
	
    list.forEach(s->System.out.println(s));
	
    list.forEach(System.out::println);

    //使用Function接口
	
    String s=Function_test("hello word",(s1)->s1+" wind");
	
    String s2=Function_test("hello word",(s1)->{String a=s1+" hi";return a;});
	
    System.out.println(s);
    System.out.println(s2);

    //測試supplier接口
	
    List<Integer> mao=Supplier_test(5,()->(int)(Math.random()*10));
    mao.forEach(System.out::println);

    //測試下斷言接口predicate
	
    List<String> list1= Arrays.asList("hello","wored","english","china");
	
    List<String> list2=predicte(list1,(ss)->ss.contains("o"));
    list2.forEach(System.out::println);
}

public static String Function_test(String str, Function<String,String> f){

    return f.apply(str);
}

public static List<Integer> Supplier_test(int n, Supplier<Integer> s){

List<Integer> list =new ArrayList<>();
	
    for(int i=0;i<n;i++)
	
    list.add(s.get());
	
    return list;

}

public static List<String> predicte(List<String> list, Predicate<String> p){

List<String> re=new ArrayList<>();
	
   for (String s:list)
   
       if(p.test(s))
	   
           re.add(s);
		   
     return re;

} }