class

Java “VariableDeclaratorId expected after this token”

不羁岁月 提交于 2020-01-30 05:24:19
问题 I'm working on a little project for fun, that's essentially a little combat emulator. I'm trying to use a class similar to struct in C++, as in using it to create an object (in this case, a character or "entity", as the class is called). I'm getting the error in the title when attempting to call any integer in said class from the main function. class entity{ public int health; public int accuracy; public int power; public int defense; } And public class Tutorial { static Random rnd = new

Java “VariableDeclaratorId expected after this token”

二次信任 提交于 2020-01-30 05:23:22
问题 I'm working on a little project for fun, that's essentially a little combat emulator. I'm trying to use a class similar to struct in C++, as in using it to create an object (in this case, a character or "entity", as the class is called). I'm getting the error in the title when attempting to call any integer in said class from the main function. class entity{ public int health; public int accuracy; public int power; public int defense; } And public class Tutorial { static Random rnd = new

Refer to class inside of static method without using its name

我的未来我决定 提交于 2020-01-30 02:41:53
问题 How can I refer to a class from a static method without using the class name itself in JavaScript (similar to PHP's self and self::method_name )? For example, in the class below, how can I refer to the method foo and the method bar inside of the foobar method without the use of FooBar.methodName ? class FooBar { static foo() { return 'foo'; } static bar() { return 'bar'; } static foobar() { return FooBar.foo() + FooBar.bar(); // self::foo() + self::bar() would have been more desirable. } }

spring5学习系列之------2 给容器注册组件二 @ComponentScan 自定义扫描规则,过滤组件

我只是一个虾纸丫 提交于 2020-01-30 00:40:53
最近几篇博客是作者对自己是之前工作中对spring的一个回顾和总结,比较基础,但是也有一些细节之前用的比较少,这次查漏补缺中,在上篇博客中介绍了对spring的IOC容器注册组件的一个方法,我们不可能把所有的bean都用Bean的注解给注入到容器中,所以本文介绍注册到容器中的第二种方式,使用包扫描的方式去注册到容器中,并且还在包扫描的基础上,加点自定义的规则 首先建立一个controller service dao 分别标注上 @Controller @Service @Repository,并且 在config上指定包扫描的范围加上@ComponentScan注解,整体结构如图 编写测试类 会发现都扫描到了 包扫描+组件标注注解(@Controller/@Service/@Repository/@Component)[自己写的类],那么我们点开@ComponentScan看一下源码,会发现有两个属性是Filter[] 类型的,因此我们再次点开Filter, filte也是一个注解,里面会有根据type来过滤,所以,看懂源码之后这么指定过滤规则 @Configuration @ComponentScan(value = "com.study.chap3",excludeFilters = { @ComponentScan.Filter(type = FilterType

Java Swing: Access panel components from another class

假如想象 提交于 2020-01-29 20:33:27
问题 Hi i basically have two classes, one main and one just to separate the panels, just for code readability really. i have : public class Main{ public static void main (String args[]) { JFrame mainJFrame; mainJFrame = new JFrame(); //some other code here CenterPanel centerPanel = new CenterPanel(); centerPanel.renderPanel(); mainFrame.add(centerPanel.getGUI()); } } class CenterPanel{ JPanel center = new JPanel(); public void renderPanel(){ JButton enterButton = new JButton("enter"); JButton

C/C++关键字const与class对象

∥☆過路亽.° 提交于 2020-01-29 14:54:16
#include<iostream> using namespace std; class Demo { public: //不论将来会不会使用,但是只要自定义了构造函数 //为了防止会用到无参构造函数,就先把这个定义到这里 Demo(){} Demo(int a,int b) { this->a = a; this->b = b; } void show() { cout << "a = " << a << endl; cout << "b = " << b << endl; //因为show() 是一个非静态成员函数 //因此这里第一个参数是一个 Demo *this 类型的形参 //所以就可以调用getValue();这个函数了, //而且调用方式相当于 // /* void show(Demo *this) { getValue(this) } */ } //void setValue(const Demo *this,int a,int b) //一般const 不这样用,从字面意思,是设置值 //void setValue(int a,int b)const void setValue(int a,int b) { //因为加了const 所以这里将不会被修改, //因为后面的const 实际上是修饰这里的第一个隐含的 //当前对象:const Demo *this /

TypeScript, how to keep class methods event handlers context to “this” instance

為{幸葍}努か 提交于 2020-01-29 06:04:55
问题 I have an issue with Classes in TypeScript. each time I have to listen to an HTML Element events I need to use Function.bind() to connect it to the current instance. class VideoAdProgressTracker extends EventDispatcher { private _video:HTMLVideoElement; constructor(video:HTMLVideoElement) { super(); this._video = video; this._video.addEventListener("timeupdate", this.handleTimeUpdateEvent); } private handleTimeUpdateEvent(event) { // Something } } I don't have to save the bound anonymous

Spring4基础 学习笔记(5) ---- Spring与Dao

让人想犯罪 __ 提交于 2020-01-28 23:12:31
Spring与DAO: Spring与JDBC模板:为了避免直接使用JDBC而带来的复杂且冗长的代码,Spring提供了一个强有力的模板类:JdbcTemplate 来简化JDBC操作。并且,数据源DataSource对象与模板JdbcTemplate对象均可通过Bean的形式定义在配置文件中,充分发挥了依赖注入的特性。 依赖jar:使用c3p0数据库连接池,Spring的JDBC.jar,Spring的事务jar,数据库驱动 一般的Service层访问Dao层: StudentServiceImpl实现-------->IStudentService接口 StudentServiceImpl 持有 Dao的引用 ,由容器注入,Impl的实现依赖于Dao(调用Dao接口的方法) Dao接口定义了访问DB的方法 定义Dao的实现类,将来注入StudentServiceImpl的类 使用JdbTemplate,Dao实现类 继承 JdbcDaoSupport,JdbcTemplate为该类的成员变量 增删改统一使用update方法: @Override public void insertStudent(Student student ) { String sql = "insert into student(name,age) values(?,?)" ; // TODO Auto

class 静态属性

廉价感情. 提交于 2020-01-28 21:12:26
class 静态属性 提案- ES6 明确规定,Class 内部只有静态方法,没有静态属性。现在有一个 提案 提供了类的静态属性,写法是在实例属性的前面,加上static关键字。 注意是:提案。但是目前babel都支持静态属性。 以下代码经babel编译后,静态属性正常使用。 class AA{ static name= "AA"; static say(){ console.log('static method') } } console.log(AA.name); AA.say() 来源: https://www.cnblogs.com/mengfangui/p/12238774.html

Takes exactly 3 arguments (4 given)

▼魔方 西西 提交于 2020-01-28 09:59:35
问题 i'm refactoring code in order to add object orientation and am just testing the code. pattern = r"((([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])[ (\[]?(\.|dot)[ )\]]?){3}([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5]))" class Lineobject(object): def __init__(self, pattern, line): self.ip = self.getip(self, pattern, line) def getip (self, pattern, line): for match in re.findall(pattern, line): results = '' ips = match[0] usergeneratedblacklist.write(ips) usergeneratedblacklist.write('\n') return ips When