package com.mayikt;  import java.util.ArrayList; import java.util.function.Consumer;  /**  * @ClassName Test06  * @Author 蚂蚁课堂余胜军 QQ644064779 www.mayikt.com  * @Version V1.0  **/ public class Test06 {     public static void main(String[] args) {         ArrayList strings = new ArrayList<>();         strings.add("mayikt");         strings.add("meite");         strings.add("xiaowei"); //        strings.forEach(new Consumer() { //            @Override //            public void accept(String s) { //                System.out.println(s); //            } //        });         strings.forEach(s -> {             System.out.println(s);         });      } }











package com.mayikt;
import com.mayikt.entity.UserEntity;
import java.util.ArrayList;
import java.util.Comparator;
/**
* @ClassName Test07
* @Author 蚂蚁课堂余胜军 QQ644064779 www.mayikt.com
* @Version V1.0
**/
public class Test07 {
public static void main(String[] args) {
ArrayList userLists = new ArrayList<>();
userLists.add(new UserEntity("xiaomin", 12));
userLists.add(new UserEntity("xiaoxiao", 6));
userLists.add(new UserEntity("xiaojun", 23));
userLists.sort(new Comparator() {
@Override
public int compare(UserEntity o1, UserEntity o2) {
return o1.getAge() - o2.getAge();
}
});
userLists.sort((o1, o2) -> o1.getAge() - o2.getAge()
);
userLists.forEach((t) -> {
System.out.println(t.toString());
});
}
}