java成员变量在什么时候赋值的?

public class MyClass {
  private int a = 1; // field declaration with initializer

  {
    // instance initializer 1
    a = 2;
  }

  public MyClass() {
    // constructor
    a = 4;
  }

  {
    // instance initializer 2
    a = 3;
  }
}