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https://github.com/4ker/stackoverflow-java-top-qa#stackoverflow-java-top-qa
https://github.com/4ker/stackoverflow-java-top-qa#一些基本的约定
https://github.com/4ker/stackoverflow-java-top-qa#每个人可以做但不限于
https://github.com/4ker/stackoverflow-java-top-qa#文档优化反馈
吐槽区https://github.com/giantray/stackoverflow-java-top-qa/issues/66
https://github.com/4ker/stackoverflow-java-top-qa#目录
https://github.com/4ker/stackoverflow-java-top-qa#3238-基础语法
Java += 操作符实质https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/java-operator.md
将 Inputstream 转换为 Stringhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/read-convert-an-inputstream-to-a-string.md
将数组转换为 Listhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/create-arraylist-from-array.md
如何遍历 map 对象https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/iterate-through-a-hashmap.md
public，protected，private，不加修饰符。有什么区别呢？https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/in-java-whats-the-difference-between-public-default-protected-and-private.md
如何测试一个数组是否包含指定的值？https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-test-if-an-array-contains-a-certain-value.md
重写（Override）equlas 和 hashCode 方法时应考虑的问题https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-issues-should-be-considered-when-overriding-equals-and-hashcode-in-java.md
从一个多层嵌套循环中直接跳出https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/breaking-out-of-nested-loops-in-java.md
如何将 String 转换为 Inthttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/converting-string-to-int-in-java.md
如何分割（split）string 字符串https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-split-a-string-in-java.md
在 java 中如何对比（compare）stringhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-do-i-compare-strings-in-java.md
=Map=基于 Value 值排序https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-sort-a-mapkey-value-on-the-values-in-java.md
HashMap 和 Hashtable 的区别https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/differences-between-hashmap-and-hashtable.md
如何便捷地将两个数组合到一起https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-concatenate-two-arrays-in-java.md
Java 是否支持默认的参数值https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/does-java-support-default-parameter-values.md
Java 产生指定范围的随机数https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/generating-random-integers-in-a-range-with-Java.md
JavaBean 到底是什么https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-a-javabean-exactly.md
wait() 和 sleep() 的区别https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/difference-between-wait-and-sleep.md
能否在一个构造器中调用另一个构造器https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-do-i-call-one-constructor-from-another-in-java.md
=finally= 代码块总会被执行么https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/does-finally-always-execute-in-java.md
如何将 String 转换为 enumhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/convert-a-string-to-an-enum-in-java.md
在 Java 中声明数组https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/declare-array-in-java.md
反射是什么及其用途https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-reflection-and-why-is-it-useful.md
https://github.com/4ker/JavaAOPhttps://github.com/4ker/JavaAOP
为什么不能用 string 类型进行 switch 判断https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/why-cant-i-switch-on-a-string.md
比较 java 枚举成员使用 equal 还是 ==https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/comparing-java-enum-members-or-equals.md
用 java 怎么创建一个文件并向该文件写文本内容https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-create-a-file-and-write-to-a-file-in-java.md
serialVersionUID 有什么作用？该如何使用？https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-a-serialversionuid-and-why-should-i-use-it.md
为什么 Java 的 Vector 类被认为是过时的或者废弃的https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/why-is-java-vector-class-considered-obsolete-or-deprecated.md
Java 的 foreach 循环是如何工作的https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-does-the-java-for-each-loop-work.md
为什么相减这两个时间（1927 年）会得到奇怪的结果https://github.com/4ker/stackoverflow-java-top-qa/blob/master/why-is-subtracting-these-two-times-in-1927-giving-a-strange-result.md
该什么时候使用 ThreadLocal 变量，它是如何工作的https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/when-and-how-should-i-use-a-threadlocal-variable.md
servlets 的运行原理https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-do-servlets-work-instantiation-shared-variables-and-multithreading.md
如何计算 MD5 值https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-generate-an-md5-hash.md
Java 中软引用和弱引用的区别https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-the-difference-between-a-soft-reference-and-a-weak-reference-in-java.md
JSF, Servlet 和 JSPhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-the-difference-between-jsf-servlet-and-jsp.md
Java 内部类和嵌套静态类https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/java-inner-class-and-static-nested-class.md
=@Component=, @Repository, @Service 的区别https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/whats-the-difference-between-component-repository-service-annotations-in.md
如何创建泛型 java 数组https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-create-a-generic-array-in-java.md
https://github.com/4ker/stackoverflow-java-top-qa#821-编程技巧
去掉烦人的 =!=null=（判空语句）https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/avoiding-null-statements-in-java.md
获取完整的堆栈信息https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/get-current-stack-trace-in-java.md
如何用一行代码初始化一个 ArrayListhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/initialization-of-an-arraylist-in-one-line.md
初始化静态 maphttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-initialize-a-static-map.md
给 3 个布尔变量，当其中有 2 个或者 2 个以上为 true 才返回 truehttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/check-if-at-least-two-out-of-three-booleans-are-true.md
输出 Java 数组最简单的方式https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/whats-the-simplest-way-to-print-a-java-array.md
什么在 java 中存放密码更倾向于 char 而不是 Stringhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/why-is-char-preferred-over-string-for-passwords-in-java.md
如何避免在 JSP 文件中使用 Java 代码https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-avoid-java-code-in-jsp-files.md
Java 源码里的设计模式https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/examples-of-gof-design-patterns-in-javas-core-libraries.md
如何产生一个随机的字母数字串作为 session 的唯一标识符https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-generate-a-random-alpha-numeric-string.md
如何创建单例https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/what-is-an-efficient-way-to-implement-a-singleton-in-java.md
实现 Runnable 接口 VS. 继承 Thread 类https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/implements-runnable-vs-extends-thread.md
我应该用哪一个 @NotNull 注解https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/which-notnull-java-annotation-should-i-use.md
怎样将堆栈追踪信息转换为字符串https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-convert-a-stack-trace-to-a-string.md
如何处理 java.lang.outOfMemoryError PermGen space errorhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/dealing-with-java-lang-outofmemoryerror-permgen-space-error.md
如何在整数左填充 0https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-pad-an-integers-with-zeros-on-the-left.md
在调用 instanceof 前需要进行 null 检查吗https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/is-null-check-needed-before-calling-instanceof.md
如何从文件里读取字符串https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-do-i-create-a-java-string-from-the-contents-of-a-file.md
遍历集合时移除元素，怎样避免 ConcurrentModificationException 异常抛出https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/iterating-through-a-collection-avoiding-concurrentmodificationexception-when-reiterating-through-a-collection-avoiding-concurrentmodificationexception-when-re.md
如何让 IntelliJ 编辑器永久性显示代码行数https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-permanently-have-line-numbers-in-intellij.md
如何使用 maven 把项目及其依赖打包为可运行 jar 包https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-can-i-create-an-executable-jar-with-dependencies-using-maven.md
https://github.com/4ker/stackoverflow-java-top-qa#网络
如何使用 java.net.URLConnection 接收及发送 HTTP 请求https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/using-java-net-urlconnection-to-fire-and-handle-http-requests.md
https://github.com/4ker/stackoverflow-java-top-qa#性能
LinkedList、ArrayList 各自的使用场景，如何确认应该用哪一个呢？https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/when-to-use-linkedlist-over-arraylist.md
StringBuilder 和 StringBuffer 有哪些区别呢https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/stringbuilder-and-stringbuffer.md
为什么处理排序的数组要比非排序的快https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/why-is-processing-a-sorted-array-faster-than-an-unsorted-array.md
如何使用 Java 创建一个内存泄漏的程序https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/creating-a-memory-leak-with-java.md
为什么打印“B”会明显的比打印“#”慢https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/why-is-printing-b-dramatically-slower-than-printing.md
https://github.com/4ker/stackoverflow-java-top-qa#测试
如何测试 private 方法，变量或者内部类https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-to-test-a-class-that-has-private-methods-fields-or-inner-classes.md
JUnit4 如何断言确定异常的抛出https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/how-do-you-assert-that-a-certain-exception-is-thrown-in-junit-4-tests.md
https://github.com/4ker/stackoverflow-java-top-qa#android
在 Android 里面下载文件，并在 ProgressDialog 显示进度https://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog.md
如何获取 Android 设备唯一 IDhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/is-there-a-unique-android-device-id.md
安装 Android SDK 的时候找不到 JDKhttps://github.com/4ker/stackoverflow-java-top-qa/blob/master/contents/android-sdk-installation-doesnt-find-jdk.md
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排版是门学问 Latest Nov 5, 2016 https://github.com/4ker/stackoverflow-java-top-qa/releases/tag/v0.1
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