java - 有没有办法找出哪个 IF 条件 'triggered' 进入 if (){ } block ？

Question

在此示例中:

if (object instanceof SomeThing || object instanceof OtherThing) {
    System.out.println("this block was entered because of: " + **____** )
}

我可以检查真实条件是SomeThing 还是OtherThing 吗？

编辑:我试图避免条件分离。

谢谢。

Answer 1

将这两种情况下的所有常见步骤重构为一个函数，然后:

if (object instanceof SomeThing) {
    // It's SomeThing
    System.out.println("Got here because it's SomeThing");
    commonStuff();
}
else if (object instanceof OtherThing) {
    // It's OtherThing
    System.out.println("Got here because it's OtherThing");
    commonStuff();
}

---

重新编辑:

edit: I'm trying to avoid the separation of conditions.

然后您有以下选择:

if (object instanceof SomeThing || object instanceof OtherThing) {
    System.out.println("Got here because it's " +
        (object instanceof SomeThing) ? "SomeThing" : "OtherThing")
    );
}

或者

boolean isSomeThing:
if ((isSomeThing = object instanceof SomeThing) || object instanceof OtherThing) {
    System.out.println("Got here because it's " +
        isSomeThing ? "SomeThing" : "OtherThing")
    );
}