Java函数式接口：Predicate

package unit6;

import java.util.function.Predicate;

public class Stream7 {

public static void main(String[] args) {

// java.util.function.Predicate

// ???????public interface Predicate<T> {

// ???????????boolean test(T t);

// ???????}

// 断定型接口：有一个输入参数、返回值只能是布尔值

Predicate<String> predicate = (str)->str.equals("abc");

boolean boo = predicate.test("abc");

System.out.println(boo);

}

}