从集合中找出满足条件的元素，apache的CollectionUtils

package com.bh.apach.collection.test;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.Predicate;

public class CollectionTest2 {

public CollectionTest2() {
Test2();
}
private void Test2() {

List<People> list=new ArrayList<>();
People p1=new People(1,"a");
People p2=new People(2,"b");
People p3=new People(3,"c");
People p4=new People(4,"d");
People p5=new People(5,"a");
list.add(p1);
list.add(p2);
list.add(p3);
list.add(p4);
list.add(p5);
List<People> list2 = (List<People>) CollectionUtils.select(list, new Predicate<People>() {

@Override
public boolean evaluate(People param) {
if("a".equals(param.getName())){
return true;
}
return false;
}
});
for(People str:list2){
System.out.println(str.getId());
}
}
public static void main(String[] args) {
new CollectionTest2();
}
class People {
private int id;
private String name;
public People(int id, String name) {
super();
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

}
}