java8 从对象集合中取出某个字段的集合
public class FeildTest {
public static void main(String[] args) {
//定义list集合
List<P> list = (new P(1, "哈哈"), new P(2, "嘿嘿"), new P(3, "呵呵"));
//从list集合中，取出字段name的列表
List<String> names = ().map(p -> ()).collect(());
System.out.println(names);
}
}
class P{
int id;
String name;
public P(int id, String name) {
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;
}
}