Java新特性解读JDK8之流操作sorted和limit函数

    /**
     * Returns a stream consisting of the elements of this stream, sorted
     * according to natural order.  If the elements of this stream are not
     * {@code Comparable}, a {@code java.lang.ClassCastException} may be thrown
     * when the terminal operation is executed.
     *这里请注意：元素必须实现Comparable接口
     */
    Stream<T> sorted();

package com.example.streamdemo;


import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;


public class SortedDemo {


  public static void main(String[] args) {


    //自然排序
    List<String> list = Arrays.asList("java","c","Python");
    List<String> list2 = list.stream().sorted().collect(Collectors.toList());
    System.out.println(list2);
    
    //自定义排序
    List<String> list3 = Arrays.asList("c++","c#","Visual Basic.NET");
    //根据元素长度排序
    //List<String> list4 = list3.stream().sorted(Comparator.comparing(obj->obj.length())).collect(Collectors.toList());
    //System.out.println(list4);
    
    //List<String> list5 = list3.stream().sorted(Comparator.comparing(obj ->obj.length(),Comparator.reverseOrder())).collect(Collectors.toList());
    //System.out.println(list5);
    
    List<String> list6=list3.stream().sorted(Comparator.comparing(String::length).reversed()).collect(Collectors.toList());
    System.out.println(list6);
  }
}

package com.example.streamdemo;


import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;


public class LimitDemo {
  public static void main(String[] args) {
    List<String> list = Arrays.asList("java","c","Python");
    List<String> list2 = list.stream().sorted().limit(1).collect(Collectors.toList());
    System.out.println(list2);
  }


}