java - 使用 try 语句声明对象

Question

try {
  Man Fred = new Man();
} catch (exception e) {
  Print e 
}

Print Fred.getName ();

Fred 现在超出了范围。我应该怎么做？

Answer 1

你似乎了解 Java 语法，所以是伪的

 Man Fred = null;
    try {
      Fred = new Man();
    } catch (exception e) {
      print e 
    } finally {
       //You could do some clean up.
    }

    if(Fred != null) {
      print Fred.getName();
    }

如果没有..

   Man fred = null;
   try {
      fred = new Man();
    } catch (Exception e) {
      System.out.println(e.printStackTrace());
    } finally {
       //You could do some clean up.
    }

    if(fred != null) {
      System.out.println(fred.getName());
    }

Fred 变量必须在 try block 之外声明。所以它在方法或外部作用域中是可见的。