字段初始化中未处理的异常

Question

Java是否有任何语法来管理在声明和初始化类的成员变量时可能抛出的异常？

public class MyClass
{
  // Doesn't compile because constructor can throw IOException
  private static MyFileWriter x = new MyFileWriter("foo.txt"); 
  ...
}

或者这些初始化总是必须移动到一个方法,我们可以throws IOException在try-catch块中声明或包装初始化？

Answer 1

使用静态初始化块

public class MyClass
{
  private static MyFileWriter x;

  static {
    try {
      x = new MyFileWriter("foo.txt"); 
    } catch (Exception e) {
      logging_and _stuff_you_might_want_to_terminate_the_app_here_blah();
    } // end try-catch
  } // end static init block
  ...
}