但是最终我的结论还是倾向于用private,并用setter和getter,这个setter其实也是破坏了封装性(而public成员变量是根本没有封装性),但是如果真的不需要的话,你可以选择不要它。而且使用setter应该比直接将某个成员设为public更好,好处是你可以控制,比如添加验证参数是否合法,如果暴露为public,是完全无法控制的。举例来说,...
包修饰符比 public 和 protected 修饰符更受限制,但比 private 修饰符限制更少。 注:本文由VeryToolz翻译自Public vs Protected vs Package vs Private Access Modifier in Java,非经特殊声明,文中代码和图片版权归原作者mroshanmishra0072所有,本译文的传播和使用请遵循“署名-相同方式共享 4.0 国际 (CC BY-SA ...
*/@ComponentpublicclassRedisDistributedId{@AutowiredprivateStringRedisTemplate redisTemplate;privatestaticfinallongBEGIN_TIMESTAMP=1659312000l;/** * 生成分布式ID * 符号位 时间戳[31位] 自增序号【32位】 *@paramitem *@return*/publiclongnextId(String item){// 1.生成时间戳LocalDateTimenow=LocalDateTime....
Secrets are strings of characters that shouldn't be shared with the outside world: they could be database passwords, private encryption keys, personal access tokens, and so on. For enhanced security, many people also consider that anything that could help an attacker should be considered a ...
public class StackError { private static int count = 1; public static void main(String[] args) { System.out.println(count); count++; main(args); } } 1. 2. 3. 4. 5. 6. 7. 8. 未设置栈大小结果: 设置栈的大小 执行结果: 分析 说明:可以看到,没有设置栈内存大小的时候,程序可以递归108...
首先是public变量,随后是protected变量,再后是包一级别的变量(没有访问修饰符),最后是private变量。 6 构造器 7 方法 这些方法应该按功能,而非作用域或访问权限,分组。 4. 缩进排版(Indentation) 4个空格常被作为缩进排版的一个单位。缩进的确切解释并未详细指定(空格vs.制表符)。一个制表符等于8个空格(而非4...
public class Main { public static void main(String[] args) { try { System.out.println("Testing Assertions..."); assert true : "We don't see this."; assert false : "Visible if assertions are ON."; } catch (AssertionError e) { ...
Different bug prediction approaches use various public or private bug datasets. Although these datasets seem very similar, they are often very different in some aspects that is also true within the categories mentioned above. In this study, we gather datasets that can be found, but we will focus...
class LambdaExpressionWithNonExistentIdCrashesJavacTest { void foo() { bar(()-> { new NonExistentClass(){ public void any() {} }; }); } void bar(Runnable r) {} }where the NonExistentClass was an existing but inaccessible class. Starting with JDK 8u20, javac produces an error mess...
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