一、准备工作
1、声明一个对象
class User{
private Integer userId;
private String userName;
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public User(Integer userId, String userName) {
this.userId = userId;
this.userName = userName;
}
public User() {
}
@Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
'}';
}
}
二、开始测试
1、测试代码
@Test
public void lambdaTest1(){
List list = new ArrayList<>();
list.add(new User(1,"张三"));
list.add(new User(4,"赵六"));
list.add(new User(2,"李四"));
list.add(new User(3,"王五"));
//条件删除
list.removeIf(user -> user.getUserId() == 3);
System.out.println("--------------排序前");
list.forEach(user -> {
System.out.println(user);
});
list.sort((user1,user2)->user1.getUserId() - user2.getUserId());
System.out.println("_-------------------正序排序后");
list.forEach(user -> {
System.out.println(user);
});
System.out.println("--------------------倒序排序后：");
list.sort((((o1, o2) -> o2.getUserId() - o1.getUserId())));
list.forEach(user -> {
System.out.println(user);
});
}
2、输出结果
标签：userName,List,list,public,User,排序,Java8,userId,user
来源： /romantic-321/p/14335817.html
