java lambda表达式检查list集合是否存在某个值

import java.util.ArrayList;

import java.util.List;

import java.util.stream.Collectors;

public class Test {

    public static void main(String[] args) {

        People p1 = new People("b", "b");

        People p2 = new People("a", "b11");

        List<People> list = new ArrayList<People>();

        list.add(p1);

        list.add(p2);

        boolean bool = list.stream().anyMatch(a -> a.getName().equals("a") || a.getNick().equals("a"));

        System.out.println(bool);

        List<People> data = list.stream().filter(a -> a.getName().equals("a") || a.getNick().equals("a"))

                .collect(Collectors.toList());

        if(data!=null && data.size() > 0) {

            for (int i = 0; i < data.size(); i++) {

                System.out.println(data.get(i).getName() + "---" + data.get(i).getNick());

            }

        }

    }

}

public class People

{

    private String name;

    private String nick;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getNick() {

        return nick;

    }

    public void setNick(String nick) {

        this.nick = nick;

    }

    public People(String name, String nick) {

        super();

        this.name = name;

        this.nick = nick;

    }

}

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