jdk1.8的stream简单-》到复杂的例子

public class Student {

private String name;

private Integer age;



public Student() {
	super();
}

public Student(String name, Integer age) {
	super();
	this.name = name;
	this.age = age;
}

public String getName() {
	return name;
}

public void setName(String name) {
	this.name = name;
}

public Integer getAge() {
	return age;
}

public void setAge(Integer age) {
	this.age = age;
}

@Override
public String toString() {
	return "Student [name=" + name + ", age=" + age + "]";
}

}

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

public class DemoJdk {

public static void main(String[] args) {
	Student stu = new Student("kxs",15);
	Student stu1 = new Student("kxs1",18);
	Student stu2 = new Student("kxs2",19);
    List<Student> lists = Arrays.asList(stu,stu1,stu2); //把对象添加到集合中，可以使用集合的add()方法，
    List<String> listNames = lists.stream().map(Student::getName).collect(Collectors.toList());
    System.out.println("名字集合listNames"+listNames);//名字集合listNames[kxs, kxs1, kxs2]
    List<String> listName2 = lists.stream().map(entity->entity.getName()).collect(Collectors.toList());
    System.out.println("名字集合listName2"+listName2);//名字集合listName2[kxs, kxs1, kxs2]
    List<String> listName3 = lists.stream().map(entity->{
    	return entity.getName();//在idea里面可能会报错，因为如果{}里面就一行代码{}和return可以省略
    }).collect(Collectors.toList());
    System.out.println("名字集合listName3"+listName3);//名字集合listName3[kxs, kxs1, kxs2]
}

}