20个高级Java面试题汇总 丨 伊成Blog



20个高级Java面试题汇总 丨 伊成Blog

  1. 什么是可变参数?
  2. 断言的用途?
  3. 什么时候使用断言?
  4. 什么是垃圾回收?
  5. 用一个例子解释垃圾回收?
  6. 什么时候运行垃圾回收?
  7. 垃圾回收的最佳做法?
  8. 什么是初始化数据块?
  9. 什么是静态初始化器?
  10. 什么是实例初始化块?
  11. 什么是正则表达式?
  12. 什么是令牌化?
  13. 给出令牌化的例子?
  14. 如何使用扫描器类(Scanner Class)令牌化?
  15. 如何添加小时(hour)到一个日期对象(Date Objects)?
  16. 如何格式化日期对象?
  17. Java中日历类(Calendar Class)的用途?
  18. 如何在Java中获取日历类的实例?
  19. 解释一些日历类中的重要方法?
  20. 数字格式化类(Number Format Class)的用途?


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